Stock Purchase Agreement

                                      among

                             Key Energy Group, Inc.,

                                       and

                          Michael and Georgia McDermett










                          Dated as of January 10, 1997







I:\PBOOKER\JMA\Key   Energy  Group\Cobra  Stock  Purchase   Agreement.wpd  Stock
Purchase  Agreement This Stock Purchase  Agreement (this AAgreement@) is entered
into as of January  10,  1997 by and among Key Energy  Group,  Inc.,  a Maryland
corporation  (AKey@),  and Michael McDermett and Georgia  McDermett,  individual
residents of the State of Texas (individually the AShareholder@ and collectively
the AShareholders@). W I T N E S S E T H: WHEREAS, the Shareholders own 500
 shares (the ACobra Shares@) of common stock,  par value $1.00 per share (ACobra
Common Stock@), of Cobra Industries,  Inc., a New Mexico corporation  (ACobra@),
which  constitute all of the issued and  outstanding  shares of capital stock of
Cobra; and WHEREAS,  the  Shareholders  desire to sell to Key and Key desires to
purchase from the Shareholders  all of the issued and outstanding  capital stock
of Cobra. NOW, THEREFORE,  in consideration of the foregoing premises and of the
mutual  covenants and  agreements  herein  contained,  the parties hereto hereby
agree as follows:
                                    ARTICLE 1
                               Purchase and Sale
ARTICLE 1 Purchase and Sale
1.1. Purchase and Sale of Cobra  Shares.Purchase and
Sale of Cobra Shares. Subject to the terms and conditions of this Agreement,  at
the Closing  (as defined in Section  1.2),  the  Shareholders  agree to sell and
convey  to Key,  free and  clear of all  Encumbrances  (as  defined  in  Section
2.1.8.1),  and Key agrees to purchase and accept from the  Shareholders,  all of
the Cobra Shares.  In consideration  of the sale of the Cobra Shares,  Key shall
pay and deliver to the Shareholders at the Closing: (i) $5,000,000 to be paid to
the  Shareholders by means of a wire transfer of immediately  available funds to
the account  designated in writing by the  Shareholders and (ii) shall institute
such  action  required  under  Section  7.7  hereof  for  the  issuance  to  the
Shareholders  of 175,000  shares (the AKey Shares@) of common  stock,  par value
$.10 per share, of Key (AKey Common Stock@).  1.2. Time and Place of Closing1.2.
Time and Place of Closing. The closing of the transactions  contemplated by this
Agreement (the AClosing@) shall be at the offices of Lynch,  Chappell & Alsup, a
Professional Corporation,  located at 300 North Marienfeld,  Suite 700, Midland,
Texas  79701,  at 10:00 a.m. on January 10, 1997 (the  AClosing  Date@),  unless
another time, place or date is agreed to by the Shareholders and Key.

ARTICLE 2 Representations and Warranties of the ShareholdersWarranties         
reholders

2.1.   Representations   and  Warranties  of  the   Shareholders.   The  express
representations  and warranties of the Shareholders  contained in this Article 2
are  exclusive  and are in lieu of all  other  representations  and  warranties,
express, implied or statutory, or otherwise.  Subject to the foregoing,  each of
the  Shareholders  jointly  and  severally  represents  and  warrants  to Key as
follows:  2.1.1.   Organization  and  Standing.  Cobra  is  a  corporation  duly
organized,  validly existing and in good standing under the laws of the State of
New Mexico,  has full  requisite  corporate  power and authority to carry on its
business as it is  currently  conducted,  and to own and operate the  properties
currently  owned and  operated  by it, and is duly  qualified  or licensed to do
business  and is in good  standing  as a foreign  corporation  authorized  to do
business in all  jurisdictions in which the character of the properties owned or
the nature of the  business  conducted  by it would make such  qualification  or
licensing  necessary,  except  where the failure to be so  qualified or licensed
would not have a material adverse effect on its financial condition,  properties
or business.  2.1.2.  Agreement  Authorized and its Effect on Other  Obligations
Both of the Shareholders  are residents of the State of Texas,  above the age of
18  years,  and each of them has the  legal  capacity  and  requisite  power and
authority  to  enter  into,  and  perform  his or  her  obligations  under  this
Agreement.  This  Agreement  is a valid and  binding  obligation  of each of the
Shareholders  enforceable  against each of the  Shareholders  (subject to normal
equitable principles) in accordance with its terms, except as enforceability may
be limited by bankruptcy, insolvency,  reorganization,  debtor relief or similar
laws affecting the rights of creditors  generally.  The execution,  delivery and
performance  of this  Agreement by the  Shareholders  will not conflict  with or
result in a violation  or breach of any term or provision  of, nor  constitute a
default under (i) the Articles of  Incorporation  or Bylaws of Cobra or (ii) any
obligation,  indenture,  mortgage,  deed of  trust,  lease,  contract  or  other
agreement  to which Cobra or either of the  Shareholders  is a party or by which
Cobra or either of the  Shareholders or their  respective  properties are bound.
2.1.3.  Capitalization of Cobra The authorized  capitalization of Cobra consists
of 50,000 shares of Cobra Common  Stock,  of which,  as of the date hereof,  500
shares are issued and  outstanding  and held  beneficially  and of record by the
Shareholders.  On the date hereof,  Cobra does not have any outstanding options,
warrants,  calls  or  commitments  of  any  character  relating  to  any  of its
authorized  but unissued  shares of capital  stock.  All issued and  outstanding
shares of Cobra Common Stock are validly issued,  fully paid and  non-assessable
and are not subject to  preemptive  rights.  None of the  outstanding  shares of
Cobra Common  Stock is subject to any voting  trust,  voting  agreement or other
agreement or understanding with respect to the voting thereof,  nor is any proxy
in existence with respect thereto. 2.1.4. Ownership of Cobra Shares.Ownership of
Cobra  Shares.  The  Shareholders  hold good and valid title to all of the Cobra
Shares  free and  clear  of all  Encumbrances.  The  Shareholders  possess  full
authority and legal right to sell,  transfer and assign to Key the Cobra Shares,
free and clear of all Encumbrances.  Upon transfer to Key by the Shareholders of
the  Cobra  Shares,  Key  will  own the  Cobra  Shares  free  and  clear  of all
Encumbrances.  There are no claims pending or, to the knowledge of either of the
Shareholders,  threatened,  against  Cobra or  either of the  Shareholders  that
concern or affect title to the Cobra Shares, or that seek to compel the issuance
of capital stock or other securities of Cobra.  2.1.5. No Subsidiaries  There is
no corporation, partnership, joint venture, business trust or other legal entity
in  which   Cobra,   either   directly  or   indirectly   through  one  or  more
intermediaries,  owns or holds  beneficial  or  record  ownership  of at least a
majority of the outstanding voting securities.  2.1.6. Financial Statements. The
Shareholders  have  delivered to Key Cobra=s  audited  balance sheet and related
statements of income,  retained  earnings and cash flows,  with  appended  notes
which are an integral part of such statements, as of and for the 12 months ended
July 31,  1996,  and also have  delivered  to Key  copies of  Cobra=s  unaudited
balance  sheets and related  statements  of income,  retained  earnings and cash
flows as of and for the periods  beginning  August 1, 1996 and ending August 31,
September 30, October 31, and November 30, 1996. The unaudited November 30, 1996
balance  sheet,  a copy of  which is  attached  hereto  as  Schedule  2.1.6,  is
hereinafter  referred to as the AUnaudited Balance Sheet.@ All of such financial
statements delivered to Key are complete in all material respects (except,  with
respect to the  unaudited  financial  statements,  for the omission of notes and
schedules),  present  fairly the  financial  condition  of Cobra as at the dates
indicated,  and the results of operations for the respective  periods indicated,
and  have  been  prepared  in  accordance  with  generally  accepted  accounting
principles  applied on a consistent basis,  except as noted therein and subject,
in the case of interim financial statements,  to normal year-end adjustments and
other adjustments  described therein; in addition,  such financial statements as
of and for the months ended August 31,  September  30,  October 31, and November
30, 1996,  though  unaudited,  include all  adjustments  which the  Shareholders
consider necessary for a fair presentation of Cobra=s results for those periods.
November 30, 1996 shall  hereinafter be referred to as the ABalance Sheet Date.@
The accounts  receivable  reflected in the  Unaudited  Balance  Sheet,  or which
thereafter  have been acquired by Cobra,  have been collected or are current and
collectible at the aggregate  recorded amounts thereof less applicable  reserves
computed in accordance  with generally  accepted  accounting  principles,  which
reserves are adequate. 2.1.7.Liabilities.  Except as disclosed on Schedule 2.1.7
hereto,  Cobra has no liabilities or obligations,  either  accrued,  absolute or
contingent,  nor do  either  of  the  Shareholders  have  any  knowledge  of any
potential  liabilities or obligations,  which would materially  adversely affect
the value and conduct of the business of Cobra,  other than those (i)  reflected
or  reserved  against in the  Unaudited  Balance  Sheet or (ii)  incurred in the
ordinary  course of business  since the Balance  Sheet Date.  2.1.8.  Additional
Information.  Attached as Schedule  2.1.8 hereto are true,  complete and correct
lists of the  following  items:  2.1.8.1  Real  Estate.  All real  property  and
structures thereon owned,  leased or subject to a contract of purchase and sale,
or lease  commitment,  by Cobra,  with a description of the nature and amount of
any Encumbrances  thereon.  The term  AEncumbrances@  means all liens,  security
interests,  pledges, mortgages, deeds of trust, claims, rights of first refusal,
options,  charges,   restrictions  or  conditions  to  transfer  or  assignment,
liabilities,   obligations,   privileges,  equities,  easements,  rights-of-way,
limitations,  reservations,  restrictions and other  encumbrances of any kind or
nature;  2.1.8.2  Machinery and Equipment.  All rigs,  carriers,  rig equipment,
machinery, transportation equipment, tools, equipment, furnishings, and fixtures
owned,  leased  or  subject  to a  contract  of  purchase  and  sale,  or  lease
commitment,  by  Cobra  with a  description  of the  nature  and  amount  of any
Encumbrances  thereon;  2.1.8.3 Receivables.  All accounts and notes receivable,
together with (i) aging schedules by invoice date and due date, (ii) the amounts
provided for as an allowance  for bad debts,  (iii) the identity and location of
any asset in which  Cobra  holds a security  interest  to secure  payment of the
underlying indebtedness,  and (iv) a description of the nature and amount of any
Encumbrance  on such  accounts  and  notes  receivable;  2.1.8.4  Payables.  All
accounts  and  notes  payable  of  Cobra,  together  with an  appropriate  aging
schedule;   2.1.8.5  Insurance.   All  insurance  policies  or  bonds  currently
maintained by Cobra,  including  title  insurance  policies,  and those covering
Cobra=s  properties,  rigs,  machinery,   equipment,   fixtures,  employees  and
operations, as well as a listing of any deductibles, premiums, audit adjustments
or retroactive  adjustments  due or pending on such policies or any  predecessor
policies;  2.1.8.6  Contracts.  All  service  contracts  and all other  material
contracts  to which  Cobra is a party which are to be  performed  in whole or in
part after the date hereof;  2.1.8.7  Employee  Compensation  Plans.  All bonus,
incentive  compensation,  deferred  compensation,   profit-sharing,  retirement,
pension, welfare, group insurance, death benefit, or other fringe benefit plans,
arrangements  or trust  agreements  of Cobra,  together  with copies of the most
recent  reports with respect to such plans,  arrangements,  or trust  agreements
filed  with  any   governmental   agency,   and  all  Internal  Revenue  Service
determination  letters  that have been  received  with  respect  to such  plans;
2.1.8.8 Certain Salaries. The names and salary rates of all present employees of
Cobra who have salaries in excess of $50,000, and, to the extent existing on the
date of this Agreement,  all arrangements with respect to any bonuses to be paid
to them from and after the date of this  Agreement;  2.1.8.9 Bank Accounts.  The
name of each bank in which  Cobra has an account,  the  account  numbers of each
account  and the  names of all  persons  authorized  to draw  thereon;  2.1.8.10
Employee  Agreements.  Any  collective  bargaining  agreements of Cobra with any
labor  union  or  other  representative  of  employees,   including  amendments,
supplements,  and  written  or  oral  understandings,  and  all  employment  and
consulting and severance agreements of Cobra;  2.1.8.11  Intellectual  Property.
All patents,  trademarks,  copyrights  and other  intellectual  property  rights
owned,  licensed,  or used by Cobra;  2.1.8.12  Trade  Names.  All trade  names,
assumed names and fictitious names used or held by Cobra, whether and where such
names are registered,  and where used;  2.1.8.13 Promissory Notes. All long-term
and short-term promissory notes, installment contracts, loan agreements,  credit
agreements,  and any other  agreements of Cobra relating thereto or with respect
to  collateral  securing  the  same;  2.1.8.14  Guaranties.   All  indebtedness,
liabilities  and  commitments  of others and as to which  Cobra is a  guarantor,
endorser,  co-maker,  surety,  or  accommodation  maker, or contingently  liable
therefor and all letters of credit,  whether stand-by or documentary,  issued by
any third party;  2.1.8.15 Leases.  All leases to which Cobra is a party whether
as lessor or  lessee;  and  2.1.8.16  Environment.  All  environmental  permits,
approvals,   certifications,   licenses,   registrations,   orders  and  decrees
applicable  to  current  operations  conducted  by Cobra  and all  environmental
audits,  assessments,  investigations  and reviews conducted by Cobra within the
last five years on any property owned or used by it. 2.1.9.No Defaults. Cobra is
not in  default  in any  material  obligation  or  covenant  on its  part  to be
performed under any obligation,  lease, contract, order, plan or other agreement
or  arrangement  other than  those  that are not  material  to the  business  or
business  prospects  of Cobra.  2.1.10.  Absence of Certain  Changes and Events.
Other than as a result of the transactions contemplated by this Agreement, since
the Balance  Sheet Date,  there has not been:  2.1.10.1  Financial  Change.  Any
material adverse change in the financial condition, backlog, operations, assets,
liabilities or business of Cobra; 2.1.10.2 Property Damage. Any material damage,
destruction,  or loss to the  business or  properties  of Cobra  (whether or not
covered by insurance);  2.1.10.3 Dividends.  Any declaration,  setting aside, or
payment of any  dividend or other  distribution  in respect of the Cobra  Common
Stock, or any direct or indirect  redemption,  purchase or any other acquisition
by Cobra of any such stock;  2.1.10.4  Capitalization  Change. Any change in the
capital  stock or in the  number of  shares  or  classes  of the  authorized  or
outstanding  capital  stock of Cobra  as  described  in  Section  2.1.3  hereof;
2.1.10.5  Labor  Disputes.  Except as  disclosed on Schedule  2.1.16,  any labor
disputes involving Cobra; or 2.1.10.6 Other Material Changes. Any other event or
condition  known to either of the  Shareholders  particularly  pertaining to and
adversely  affecting  the  operations,  assets or  business of Cobra which would
constitute a material  adverse change.  2.1.11.  Taxes.  All federal,  state and
local income,  value added,  sales,  use,  franchise,  gross revenue,  turnover,
excise, payroll, property, employment, customs, duties and any and all other tax
returns,  reports,  and estimates have been filed with appropriate  governmental
agencies,  domestic  and  foreign,  by Cobra for each  period for which any such
returns,  reports,  or estimates were due (taking into account any extensions of
time to file  before the date  hereof);  all taxes  shown by such  returns to be
payable  and any other  taxes due and  payable  have been paid  other than those
being contested in good faith by Cobra; and the tax provisions  reflected in the
Unaudited  Balance Sheet are adequate,  in accordance  with  generally  accepted
accounting principles, to cover liabilities of Cobra at the date thereof for all
taxes,  including  any assessed  interest,  assessed  penalties and additions to
taxes of any character whatsoever applicable to Cobra or its assets or business.
No waiver of any statute of  limitations  executed by Cobra with  respect to any
income or other  tax is in effect  for any  period.  Except  for an audit by the
Internal  Revenue  Service of the 1991 federal income tax returns of Cobra,  the
income tax  returns of Cobra have never been  examined by the  Internal  Revenue
Service or the taxing  authorities of any other  jurisdiction.  There are no tax
liens on any assets of Cobra except for taxes not yet  currently  due.  Cobra is
not, never has been, nor has Cobra ever attempted to become, an S-Corp under the
Internal Revenue Code of 1986, as amended. 2.1.12.  Intellectual Property. Cobra
owns or possesses licenses to use all patents,  patent applications,  trademarks
and service marks (including  registrations  and applications  therefor),  trade
names,  copyrights  and written  know-how,  trade  secrets and all other similar
proprietary  data  and the  goodwill  associated  therewith  (collectively,  the
AIntellectual  Property@)  that are either  material to its business or that are
necessary for the  rendering of any services  rendered by it and the use or sale
of any equipment or products used or sold by it, including all such Intellectual
Property listed in Schedule 2.1.12 hereto. The Intellectual Property so owned or
possessed by Cobra is owned or licensed free and clear of any Encumbrance. Cobra
has not  granted  to any  other  person  any  license  to use  any  Intellectual
Property.  Cobra has not received any notice of infringement,  misappropriation,
or conflict with, the intellectual  property rights of others in connection with
the use by it of the  Intellectual  Property or otherwise in connection with the
operation of its business.  2.1.13.  Title to and Condition of Assets. Cobra has
good,  indefeasible  and marketable  title to all its  properties,  interests in
properties  and assets,  real and personal,  reflected in the Unaudited  Balance
Sheet or in Schedule 2.1.8 hereto, free and clear of any Encumbrance, except (i)
Encumbrances  reflected  in the  Unaudited  Balance  Sheet or in Schedule  2.1.8
hereto,  (ii) liens for current  taxes not yet due and  payable,  and (iii) such
imperfections  of  title,  easements  and  Encumbrances,  if  any,  as  are  not
substantial in character,  amount,  or extent and do not and will not materially
detract  from the value,  or  interfere  with the present  use, of the  property
subject thereto or affected  thereby,  or otherwise  materially  impair business
operations.  All leases  pursuant  to which Cobra  leases  (whether as lessee or
lessor)  any  substantial  amount  of  real  or  personal  property  are in good
standing,  valid,  and effective;  and there is not, under any such leases,  any
existing  default  or event of default  or event  which with  notice or lapse of
time, or both, would constitute a default by Cobra and in respect to which Cobra
has not taken adequate steps to prevent a default from occurring.  The buildings
and  premises  of  Cobra  that are used in its  business  are in good  operating
condition  and repair,  subject only to ordinary  wear and tear.  All rigs,  rig
equipment,  machinery,  transportation equipment, tools and other major items of
equipment of Cobra are in good operating  condition and in a state of reasonable
maintenance and repair,  ordinary wear and tear excepted,  and are free from any
known defects  except as may be repaired by routine  maintenance  and such minor
defects as to not substantially  interfere with the continued use thereof in the
conduct of normal  operations.  All such assets conform in all material respects
to all applicable  laws  governing  their use. No notice of any violation of any
law, statute,  ordinance, or regulation relating to any such assets has been (or
are being)  received  by Cobra or any of the  Shareholders,  except such as have
been fully complied with. 2.1.14.  Contracts.  All contracts,  leases,  plans or
other  arrangements  to which Cobra is a party, by which it is bound or to which
Cobra or the  assets of Cobra are  subject  are in full  force and  effect,  and
constitute  valid and binding  obligations  of Cobra.  Cobra is not,  and to the
knowledge of either of the  Shareholders,  no other party to any such  contract,
lease, plan or other  arrangement,  is in default  thereunder,  and no event has
occurred which (with or without  notice,  lapse of time, or the happening of any
other event) would  constitute a material  default  thereunder.  No contract has
been  entered  into on  terms  which  could  reasonably  be  expected  to have a
materially adverse effect on Cobra. Neither of the Shareholders has received any
information  which would cause such Shareholder to conclude that any customer of
Cobra will (or is likely to) cease doing  business with Cobra (or any successors
thereto)  as a  result  of the  consummation  of the  transactions  contemplated
hereby. 2.1.15. Licenses and Permits. Cobra possess all permits, authorizations,
certificates,   approvals,   registrations,   variances,   waivers,  exemptions,
rights-of-way,  franchises,  ordinances, licenses and other rights of every kind
and character (collectively, the APermits@) necessary under law or otherwise for
it to  conduct  its  business  as now being  conducted  and to  construct,  own,
operate,  maintain  and use its assets in the manner in which they are now being
constructed,  operated, maintained and used. Each of such Permits and the rights
of Cobra with respect thereto is (and will be following the  consummation of the
transactions  contemplated  hereby)  valid  and  subsisting,  in full  force and
effect, and enforceable by Cobra subject to administrative  powers of regulatory
agencies having  jurisdiction.  Cobra is in compliance in all material  respects
with the  terms of such  Permits.  None of such  Permits  have  been,  or to the
knowledge  of  the  Shareholders,  are  threatened  to  be,  revoked,  canceled,
suspended  or  modified.  2.1.16.  Litigation.  Except as set forth on  Schedule
2.1.16,  there is no suit,  action, or legal,  administrative,  arbitration,  or
other proceeding or governmental investigation pending to which Cobra is a party
or,  to the  knowledge  of the  Shareholders,  might  become  a party  or  which
particularly  affect  Cobra,  nor  is  any  change  in the  zoning  or  building
ordinances directly affecting the real property or leasehold interests of Cobra,
pending  or,  to  the  knowledge  of  the  Shareholders,   threatened.   2.1.17.
Environmental Compliance.

2.1.17.1  Environmental  Conditions.
Except as set  forth in  Schedule  2.1.17  hereof,  there  are no  environmental
conditions or  circumstances,  including,  without  limitation,  the presence or
release of any  hazardous  substance,  on any property  presently or  previously
owned by  Cobra,  or on any  property  to which  hazardous  substances  or waste
generated by the  operations  of Cobra or by the use of the assets of Cobra were
disposed of, which would result in a material  adverse change in the business or
business prospects of Cobra. The term Ahazardous  substance@ means (i) asbestos,
polychlorinated  biphenyls,  urea  formaldehyde,  lead based  paint,  radon gas,
petroleum,  oil,  solid  waste,  pollutants  and  contaminants,   and  (ii)  any
chemicals,   materials,  wastes  or  substances  that  are  defined,  regulated,
determined or identified as toxic or hazardous in any  Applicable  Environmental
Laws,   including,   but  not  limited  to,  substances  defined  as  Ahazardous
substances,@  Ahazardous materials,@ or Ahazardous waste@ in CERCLA, RCRA, HMTA,
or  comparable  state and  local  statutes  or in the  regulations  adopted  and
promulgated pursuant to said statutes;  2.1.17.2 Permits, etc. Cobra has in full
force and  effect  all  environmental  permits,  licenses,  approvals  and other
authorizations required to conduct its operations, other than those that are not
material  to its  business  or  operations,  and  is  operating  in  substantial
compliance thereunder;  2.1.17.3 Compliance. Neither the operations of Cobra nor
the use of the assets of Cobra  violate in any respect any  applicable  federal,
state or local  law,  statute,  ordinance,  rule,  regulation,  order or  notice
requirement  pertaining to (a) the condition or protection of air,  groundwater,
surface  water,  soil,  or  other  environmental  media,  (b)  the  environment,
including  natural  resources or any activity which affects the environment,  or
(c)  the  regulation  of any  pollutants,  contaminants,  waste,  or  substances
(whether  or  not  hazardous  or  toxic),  including,  without  limitation,  the
Comprehensive  Environmental  Response Compensation and Liability Act (42 U.S.C.
'9601 et seq.) (ACERCLA@), the Hazardous Materials Transportation Act (49 U.S.C.
'1801 et seq.) (AHMTA@),  the Resource  Conservation and Recovery Act (42 U.S.C.
'6901 et seq.) (ARCRA@), the Clean Water Act (33 U.S.C. 1251 et seq.), the Clean
Air Act (42 U.S.C.  '7401 et seq.), the Toxic Substances  Control Act (17 U.S.C.
'2601 et seq.), the Federal Insecticide  Fungicide and Rodenticide Act (7 U.S.C.
'136 et seq.),  the Safe Drinking Water Act (42 U.S.C.  '201 and '300f et seq.),
the Rivers and Harbors Act (33 U.S.C.  '401 et seq.),  the Oil Pollution Act (33
U.S.C.  '2701 et seq.)  and  analogous  federal,  interstate,  state  and  local
requirements, as any of the foregoing may have been amended or supplemented from
time to time  (collectively  the AApplicable  Environmental  Laws@),  other than
violations  that in the aggregate are not material to the business or operations
of Cobra;  2.1.17.4 Past  Compliance.  None of the operations or assets of Cobra
has ever been conducted or used in such a manner as to constitute a violation of
any of the Applicable  Environmental  Laws,  other than  violations  that in the
aggregate  are not material to the  business or  operations  of Cobra;  2.1.17.5
Environmental  Claims.  No  notice  has been  served  on Cobra or  either of the
Shareholders from any entity,  governmental  agency or individual  regarding any
existing,  pending or threatened investigation,  inquiry,  enforcement action or
litigation  related to alleged  violations  under any  Applicable  Environmental
Laws,  or  regarding  any claims for  remedial  obligations,  response  costs or
contribution under any Applicable Environmental Laws; 2.1.17.6 Renewals. Neither
of the  Shareholders  knows of any reason Cobra or their successors would not be
able to renew any of the permits,  licenses,  or other  authorizations  required
pursuant to any of the Applicable  Environmental  Laws to operate and use any of
assets of Cobra for their current  purposes and uses; and 2.1.17.7  Asbestos and
PCBs. No material  amounts of friable  asbestos  currently exist on any property
owned  or  operated  by  Cobra,  nor  do  polychlorinated   biphenyls  exist  in
concentrations of 50 parts per million or more in electrical  equipment owned or
being used by Cobra in the  operations or on the  properties  of Cobra.  2.1.18.
Compliance  with Other Laws.  Cobra is not in  violation  of or in default  with
respect to, or in alleged  violation of or alleged  default with respect to, the
Occupational  Safety and Health Act (29 U.S.C. "651 et seq.) as amended,  or any
other applicable law or any applicable rule,  regulation,  or any writ or decree
of  any  court  or  any  governmental  commission,  board,  bureau,  agency,  or
instrumentality,  or delinquent  with respect to any report required to be filed
with any governmental  commission,  board,  bureau,  agency or  instrumentality,
other than  violations that in the aggregate are not material to the business or
operations  of Cobra.  2.1.19.  No ERISA Plans or Labor  Issues;  No Penalty for
Termination of Employee  Compensation  Plans.  Cobra does not currently sponsor,
maintain or contribute to, and Cobra has not at any time  sponsored,  maintained
or  contributed  to any  employee  benefit  plan which is or was  subject to any
provisions of the Employee  Retirement  Income  Security Act of 1974, as amended
(AERISA@).  Cobra has not  engaged in any unfair  labor  practices  which  could
reasonably be expected to result in a material  adverse effect on the operations
or assets of Cobra. Except as described in Schedule 2.1.16 hereto,  Cobra has no
dispute  with any of the  existing or former  employees  of Cobra.  There are no
labor disputes or, to the knowledge of either of the Shareholders,  any disputes
threatened  by  current  or former  employees  of Cobra.  There  will not be any
penalty for the termination of any employee compensation plan listed on Schedule
2.1.8 for items in  Section  2.1.8.7.  2.1.20.  Investigations;  Litigation.  No
investigation or review by any governmental  entity with respect to Cobra or any
of the  transactions  contemplated  by this  Agreement  is  pending  or,  to the
knowledge of either of the  Shareholders,  threatened,  nor has any governmental
entity  indicated  to Cobra an  intention  to conduct the same,  and there is no
action,  suit or  proceeding  pending  or,  to the  knowledge  of  either of the
Shareholders,  threatened  against or  affecting  Cobra at law or in equity,  or
before  any  federal,   state,  municipal  or  other  governmental   department,
commission,  board, bureau, agency or instrumentality,  that either individually
or in the aggregate, does or is likely to result in a material adverse change in
the financial  condition,  properties or business of Cobra.  2.1.21.  Absence of
Certain Business Practices. Neither Cobra, nor any officer of Cobra, nor, to the
knowledge of either of the  Shareholders,  any employee or agent of Cobra or any
other person acting on behalf of Cobra, has, directly or indirectly,  within the
past five  years,  given or agreed to give any gift or  similar  benefit  to any
customer,  supplier,  government  employee or other person who is or may be in a
position  to help or  hinder  the  business  of  Cobra  (or to  assist  Cobra in
connection  with any actual or  proposed  transaction)  which (i) might  subject
Cobra to any damage or penalty in any civil, criminal or governmental litigation
or  proceeding,  (ii) if not  given in the  past,  might  have had a  materially
adverse effect on the assets,  business or operations of Cobra,  or (iii) if not
continued  in the future,  might  materially  and  adversely  affect the assets,
business  operations or prospects of Cobra or which might result in liability to
Cobra in a private or governmental  litigation or proceeding.  2.1.22.  Consents
and  Approvals.  No  consent,   approval  or  authorization  of,  or  filing  or
registration with, any governmental or regulatory authority, or any other person
or entity  other than the  Shareholders,  is  required to be made or obtained by
Cobra  in  connection  with  the  execution,  delivery  or  performance  of this
Agreement or the consummation of the transactions  contemplated hereby.  2.1.23.
Finder=s Fee. All  negotiations  relative to this Agreement and the transactions
contemplated  hereby have been carried on by the  Shareholders and their counsel
directly with Key and its counsel,  without the intervention of any other person
as the result of any act of the  Shareholders  in such manner as to give rise to
any valid claim  against any of the parties  hereto for a brokerage  commission,
finder=s fee or any similar payments. 2.2. Investment  Representations.  Each of
the Shareholders acknowledges, represents and agrees that:

2.2.1.  Shareholders  Investment Suitability  and Related  Matters.  (i) Key has
made available to the  Shareholders  the information and documents  described in
Section 3.4. hereof, (ii) such Shareholder understands the risks associated with
ownership of Key Common Stock,  and (iii) such Shareholder is capable of bearing
the financial risks associated with such ownership;

2.2.2. Key Shares Not Registered. The Key Shares have not been  registered
under the  Securities  Act of 1933,  as  amended  (the A  Securities  Act@),  or
registered or qualified  under any  applicable  state  securities  laws;

2.2.3.  Reliance on Representations.
The Key Shares are being issued to such  Shareholder in reliance upon exemptions
from such  registration or qualification  requirements,  and the availability of
such  exemptions  depends in part upon such  Shareholder=s  bona fide investment
intent with respect to the Key Shares;

2.2.4.   Investment  Intent.
Such  Shareholder's  acquisition  of the Key Shares is solely for his or her own
account for investment, and such Shareholder is not acquiring the Key Shares for
the  account  of any other  person  or with a view  toward  resale,  assignment,
fractionalization, or distribution thereof;

2.2.5.  Permitted  Resale.
Such Shareholder shall not offer for sale, sell, transfer,  pledge,  hypothecate
or  otherwise  dispose of any of the Key Shares  except in  accordance  with the
registration  requirements of the Securities Act and applicable state securities
laws  or  upon  delivery  to Key  of an  opinion  of  legal  counsel  reasonably
satisfactory to Key that an exemption from registration is available;

2.2.6.   Investor  Sophistication.
Such  Shareholder  has such  knowledge and  experience in financial and business
matters  that he or she is  capable  of  evaluating  the  merits and risks of an
investment in the Key Shares, and to make an informed  investment  decision with
respect thereto;

2.2.7.  Availability of  Information.
Such  Shareholder  has had the  opportunity  to ask  questions  of, and  receive
answers  from  Key=s  officers  and  directors   concerning  such  Shareholder=s
acquisition  of the Key Shares and to obtain such other  information  concerning
Key and the Key Shares, to the extent Key=s officers and directors possessed the
same or could  acquire  it  without  unreasonable  effort  or  expense,  as such
Shareholder  deemed  necessary in connection with making an informed  investment
decision; and

2.2.8.   Restrictive  Legends.
In addition to any other legends required by law or the other agreements entered
into in connection  herewith,  each  certificate  evidencing the Key Shares will
bear a conspicuous  restrictive legend  substantially as follows: THE SECURITIES
EVIDENCED  HEREBY HAVE NOT BEEN REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (AACT@),  OR UNDER ANY APPLICABLE STATE SECURITIES LAWS, AND THEY CANNOT
BE OFFERED FOR SALE, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE HYPOTHECATED EXCEPT
IN ACCORDANCE WITH THE REGISTRATION REQUIREMENTS OF THE ACT AND SUCH OTHER STATE
LAWS OR UPON  DELIVERY  TO THIS  CORPORATION  OF AN  OPINION  OF  LEGAL  COUNSEL
SATISFACTORY  TO  THE  CORPORATION  THAT  AN  EXEMPTION  FROM   REGISTRATION  IS
AVAILABLE.

                                    ARTICLE 3
                      Representations and Warranties of Key

         Key represents and warrants to each of the Shareholders as follows:

3.1.  Organization  and Standing.
Key is a corporation duly organized, validly existing and in good standing under
the laws of the  State of  Maryland,  has full  requisite  corporate  power  and
authority to carry on its business as it is currently conducted,  and to own and
operate the properties currently owned and operated by it, and is duly qualified
or  licensed  to do business  and is in good  standing as a foreign  corporation
authorized  to do business in all  jurisdictions  in which the  character of the
properties  owned or the nature of the business  conducted by it would make such
qualification  or  licensing  necessary,  except  where  the  failure  to  be so
qualified or licensed would not have a material  adverse effect on its financial
condition, properties or business.

3.2. Agreement Authorized and its Effect on Other Obligations.  The consummation
of the transactions contemplated hereby have been duly and validly authorized by
all necessary corporate action on the part of Key, and this Agreement is a valid
and  binding  obligation  of  Key  enforceable   (subject  to  normal  equitable
principles)  in  accordance  with its  terms,  except as  enforceability  may be
limited by bankruptcy, insolvency, reorganization, debtor relief or similar laws
affecting  the  rights of  creditors  generally.  The  execution,  delivery  and
performance  of this  Agreement  by Key will not  conflict  with or  result in a
violation or breach of any term or provision  of, or  constitute a default under
(i) the  Articles  of  Incorporation  or Bylaws  of Key or (ii) any  obligation,
indenture,  mortgage, deed of trust, lease, contract or other agreement to which
Key or any of its property is bound.

3.3.  Capitalization.
The  capitalization of Key consists of 25,000,000 shares of Key Common Stock, of
which as of the date  hereof,  11,398,050  shares are  issued  and  outstanding,
913,334  shares are  reserved for issuance  pursuant to stock  options,  825,000
shares are reserved for issuance pursuant to outstanding  warrants and 5,333,333
shares  are  reserved  for  issuance  upon  conversion  of Key=s 7%  Convertible
Subordinated  Debentures  (the  AConvertible  Debentures@).  Pursuant  to  Key=s
Certificate  of  Incorporation,  Key=s  board of  directors  has the  authority,
without  further  shareholder  action,  to redesignate all of the authorized and
unissued shares of Key Common Stock into one or more series of preferred  stock.
As of the date hereof,  no shares have been so designated  or issued.  Except as
set forth in this Section 3.3.,  there are outstanding as of the date hereof (i)
no securities of Key or any other person  convertible  into or  exchangeable  or
exercisable  for shares of capital stock or other voting  securities of Key, and
(ii) no subscriptions, options, warrants, calls, rights obligating Key to issue,
deliver,  sell,  purchase,  redeem or acquire  shares of capital  stock or other
voting  securities of Key. All of the outstanding Key Common Stock is, and, when
issued, the Key Shares will be, validly issued, fully paid and nonassessable and
not subject to any preemptive  right.  As of the date hereof there is no, and at
the Closing Date there will not be any, stockholder agreement,  voting trust, or
other agreement or understanding to which Key is a party or by which it is bound
relating to the voting of any shares of capital stock of Key.

3.4.   Reports  and  Financial  Statements.
Key has previously furnished to the Shareholders true and complete copies of (i)
Key=s annual  report filed with the  Securities  and  Exchange  Commission  (the
ACommission@)  pursuant to the  Securities  and Exchange Act of 1934, as amended
(the  AExchange  Act@),  for Key=s fiscal year ended June 30,  1996;  (ii) Key=s
quarterly and other reports filed with the Commission since June 30, 1996; (iii)
all definitive proxy solicitation materials filed with the Commission since June
30,  1996;  (iv) any  registration  statements  (other  than those  relating  to
employee  benefit plans)  declared  effective by the  Commission  since June 30,
1996; and (v) Key=s Private Offering Memorandum dated June 28, 1996, relating to
the  Convertible  Debentures.  All of the foregoing items are listed on Schedule
3.4 hereto (collectively,  the AKey SEC Documents@).  The consolidated financial
statements  of Key and its  consolidated  subsidiaries  included  in Key=s  most
recent  report on Form 10-K and most recent report on Form 10-Q were prepared in
accordance with generally accepted accounting principles applied on a consistent
basis during the periods involved and fairly present the consolidated  financial
position of Key and its  consolidated  subsidiaries  as of the dates thereof and
the consolidated  results of their operations and changes in financial  position
for the periods then ended; and the Key SEC Documents did not contain any untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated therein or necessary to make the statements  therein, in the light of the
circumstances  under which they were, made not misleading.  Since June 30, 1994,
Key has filed with the Commission all material reports,  registration statements
and other material  filings  required to be filed with the Commission  under the
rules and regulations of the Commission.

3.5. Absence of Certain Changes and Events in Key.
 Since September 30, 1996, there has not been:

3.5.1.  Financial  Change.
Any material  adverse change in the financial  condition,  backlog,  operations,
assets, liabilities or business of Key; or

3.5.2.  Other  Material  Changes.
Any  other  event or  condition  known  to Key  particularly  pertaining  to and
adversely affecting the operations, assets or business of Key, other than events
or  conditions  which are of a general  or  industry-wide  nature and of general
public knowledge, or which have been disclosed in writing to the Shareholders.

3.6.  Key=s  Compliance  with Other Laws.
Key is not  in  violation  of or in  default  with  respect  to,  or in  alleged
violation  of or alleged  default with  respect to the  Occupational  Safety and
Health Act (29 U.S.C.  ' 651 et seq., as amended),  or any applicable law or any
applicable  rule,  regulation,  or  any  writ  or  decree  of any  court  or any
governmental   commission,   board,  bureau,  agency,  or  instrumentality,   or
delinquent with respect to any report required to be filed with any governmental
commission, board, bureau, agency or instrumentality which would have a material
adverse affect upon its financial condition, properties or business.

3.7.  Consents and Approvals.
No consent,  approval or authorization of, or filing of a registration with, any
governmental or regulatory authority,  or any other person or entity is required
to be made or  obtained by Key in  connection  with the  execution,  delivery or
performance  of  this  Agreement  or  the   consummation  of  the   transactions
contemplated  hereby, other than what is required by the American Stock Exchange
for the listing of the Key Shares issuable hereunder.

3.8.  Investigations;  Litigation.
No  investigation  or review by any  governmental  entity with respect to Key in
connection  with  any of the  transactions  contemplated  by this  Agreement  is
pending or, to the best of Key=s knowledge, threatened, nor has any governmental
entity  indicated to Key an  intention to conduct the same.  There is no action,
suit or  proceeding  pending  or,  to the  best of Key=s  knowledge,  threatened
against or affecting Key by any federal,  state, municipal or other governmental
department,  commission, board, bureau, agency or instrumentality,  which either
individually  or in the  aggregate,  does or is likely to result in any material
adverse change in the financial condition, properties or businesses of Key.

3.9.  Finder=s Fee.
All negotiations  relative to this Agreement and the  transactions  contemplated
hereby have been carried on by Key and its counsel  directly  with Cobra and the
Shareholders and their counsel,  without the intervention by any other person as
the result of any act of Key in such a manner as to give rise to any valid claim
against any of the parties hereto for any brokerage commission,  finder=s fee or
any similar payments.

3.10.  Key=s Access to Cobra=s  Assets and Records.
Key  acknowledges  that it is actively engaged in the same business as is Cobra,
that it has been  afforded an  opportunity  to examine the assets and records of
Cobra,  discuss  Cobra=s  business and  operations  with the  Shareholders,  and
investigate the condition of the assets of Cobra,  and that Key is entering into
this Agreement on the basis of such  investigation and the  representations  and
warranties of the Shareholders.

                                    ARTICLE 4
                        Obligations Pending Closing Date

4.1.  Agreements  of Key and  the  Shareholders.
Except  as  expressly  contemplated  elsewhere  in this  Agreement,  Key and the
Shareholders  agree that from the date hereof until the Closing Date,  Key will,
and the Shareholders will cause Cobra to (and unless otherwise  indicated by the
context, since September 30, 1996, it has):

4.1.1.  Maintenance of Present  Business.
Operate its business only in the usual,  regular,  and ordinary  manner so as to
maintain  the  goodwill it now enjoys and,  to the extent  consistent  with such
operation,  use all reasonable  efforts to preserve intact its present  business
organization, keep available the services of its present officers and employees,
and preserve its relationships with customers, suppliers, jobbers, distributors,
and others having business dealings with it;

4.1.2.  Maintenance  of  Properties.
At its expense,  maintain  all of its  property and assets in customary  repair,
order, and condition, reasonable wear and tear excepted;

4.1.3.  Maintenance  of Books and  Records.
Maintain  its books of account and records in the usual,  regular,  and ordinary
manner, in accordance with generally accepted accounting principles applied on a
consistent basis;

4.1.4.  Compliance with  Law.
Duly comply in all material  respects with all laws  applicable to it and to the
conduct of its business;

4.1.5.   Inspection.
Permit the other  party  hereto  and their  authorized  representatives,  during
normal  business hours, to inspect its records and to consult with its officers,
employees,  attorneys, and agents for the purpose of determining the accuracy of
the representations and warranties herein made and the compliance with covenants
contained in this Agreement.  Each of the  Shareholders and Key agrees that they
will and  will  cause  their  representatives  to hold all data and  information
obtained with respect to the other party,  in confidence and further agrees that
they will not use such  data or  information  or  disclose  the same to  others,
except to the extent such data or information  either are, or become,  published
or a matter of public knowledge through the fault of its own; and

4.1.6.  Notice of Material  Developments.
Promptly notify the other party in writing of any Amaterial  adverse change@ in,
or any changes  which,  in the  aggregate,  could result in a Amaterial  adverse
change@ in, the consolidated  financial  condition,  business or affairs of such
party,  whether or not occurring in the ordinary course of business.  As used in
this  Agreement,  the term Amaterial  adverse  change@ means any change,  event,
circumstance or condition (collectively,  a AChange@) which when considered with
all other Changes would  reasonably be expected to result in a "loss" having the
effect  of so  fundamentally  adversely  affecting  the  business  or  financial
prospects  of Key or Cobra,  as the case may be,  that the  benefits  reasonably
expected to be obtained by Key or Cobra,  as the case may be, as a result of the
consummation  of the  transactions  contemplated  by  this  Agreement  would  be
jeopardized  with  relative  certainty.  The term "loss"  shall mean any and all
direct or indirect payments, obligations,  assessments,  losses, loss of income,
liabilities,  fines,  penalties,  costs and  expenses  paid or  incurred or more
likely than not to be paid or incurred,  or  diminutions in value of any kind or
character  (whether known or unknown,  conditional or  unconditional,  choate or
inchoate,  liquidated or unliquidated,  secured or unsecured, accrued, absolute,
contingent  or  otherwise)  that are more  likely  than not to occur,  including
without limitation penalties, interest on any amount payable to a third party as
a result of the foregoing and any legal or other expenses reasonably incurred or
more  likely  than  not to be  incurred  in  connection  with  investigating  or
defending  any demands,  claims,  actions or causes of action that, if adversely
determined, would likely result in losses, and all amounts paid in settlement of
claims or actions; provided, that losses shall be net of any recoveries by Cobra
from third parties and any insurance  proceeds Cobra is entitled to receive from
a nonaffiliated  insurance  company on account of such losses (after taking into
account any costs  incurred  in  obtaining  such  proceeds  and any  increase in
insurance  premiums as a result of a claim with respect to such  proceeds);  and
provided further,  that a reduction of the trading price of the Key Common Stock
on the  American  Stock  Exchange  shall  not,  in and of itself,  constitute  a
material adverse change.

4.2.  Additional  Agreements  of the  Shareholders.
Except  as  expressly  contemplated  elsewhere  in this  Agreement,  each of the
Shareholders  agree that since the Balance  Sheet Date,  Cobra has not, and from
the date hereof until the Closing Date, they will not cause or permit Cobra to:

4.2.1.  Prohibition  of Certain  Employment  Contracts.
Enter into any contracts of  employment  which cannot be terminated on notice of
30 days or less or which provide for any severance payments or benefits covering
a period beyond the earlier of the termination date or notice thereof;

4.2.2.  Prohibition of Certain  Loans
Incur any  borrowings  which would exceed  $50,000,  in the  aggregate,  for any
purpose  except (i) the  refunding of  indebtedness  now  outstanding,  (ii) the
prepayment by customers of amounts due or to become due for services rendered or
to be rendered in the future,  or (iii) as is  otherwise  approved in writing by
Key;

4.2.3.  Prohibition  of  Certain  Commitments.
Enter into commitments of a capital  expenditure  nature or incur any contingent
liabilities  which would exceed  $10,000 in the  aggregate  except (i) as may be
necessary for the maintenance of existing facilities, machinery and equipment in
good operating condition and repair in the ordinary course of business,  or (ii)
as is otherwise approved in writing by Key;

4.2.4.  Disposal  of  Assets.
Sell, dispose of, or encumber,  any property or assets,  except (i) in the usual
and ordinary course of business, (ii) property or assets which individually have
a value of less than $1,000; or (iii) as may be approved in writing by Key;

4.2.5.  Maintenance  of  Insurance.
Discontinue its current level of insurance;  provided, that if during the period
from the date hereof to and  including  the Closing  Date any of its property or
assets are damaged or destroyed by fire or other  casualty,  the  obligations of
Key and the Shareholders under this Agreement shall not be affected thereby, and
upon the Closing Date all proceeds of insurance and claims of every kind arising
as a result of any such  damage or  destruction  shall  remain the  property  of
Cobra;  4.2.6.  Acquisition  Proposals.  Directly  or  indirectly  (i)  solicit,
initiate or encourage  any inquiry or  Acquisition  Proposal  from any person or
(ii) participate in any discussions or negotiations regarding, or furnish to any
person other than Key or its representatives any information with respect to, or
otherwise  facilitate or encourage any Acquisition Proposal by any other person.
As  used  herein  AAcquisition  Proposal@  means  any  proposal  for  a  merger,
consolidation  or  other  business  combination   involving  Cobra  or  for  the
acquisition or purchase of any equity interest in, or a material  portion of the
assets of,  Cobra,  other than the  transactions  with Key and the  Shareholders
contemplated  by this  Agreement.  Cobra shall  promptly  communicate to Key the
terms of any such  written  Acquisition  Proposals  which it may  receive or any
written inquiries made to it or any of its directors, officers,  representatives
or agents;

4.2.7.   No  Amendment  to  Articles  of Incorporation.
Amend its Articles of  Incorporation  or merge or  consolidate  with or into any
other  corporation or change in any manner the rights of its common stock or the
character of its business;

4.2.8.  No Issuance,  Sale,  or Purchase of  Securities.
Issue or sell,  or issue  options or rights to  subscribe  to, or enter into any
contract or commitment  to issue or sell (upon  conversion  or  otherwise),  any
shares of Cobra Common Stock,  or subdivide or in any way  reclassify any shares
of Cobra  Common  Stock,  or acquire,  or agree to acquire,  any shares of Cobra
Common Stock; and

4.2.9.  Prohibition  on  Dividends.
Declare or pay any  dividend on shares of Cobra  Common  Stock or make any other
distribution of assets to the holders thereof.

4.3.  Agreements of Key.
Key agrees it will:

4.3.1.   No  Amendment  to  Articles  of Incorporation.
Not  amend  its  Articles  of  Incorporation  or  merge or with  into any  other
corporation or change in any manner the rights of the Key Shares; and

4.3.2.  Notice  of  Material  Developments.
Promptly furnish to the Shareholders copies of all Key=s communications to Key=s
stockholders  and all reports filed by it with the  Commission  and the American
Stock  Exchange,  and  relating  to  periodic  or  other  material  developments
concerning Key=s financial condition, business, or affairs.

                                    ARTICLE 5
                      Conditions Precedent to Obligations

5.1.  Conditions  Precedent to Obligations of Shareholders.
The  obligations  of  Shareholders  to  consummate  and effect the  transactions
contemplated  hereunder  shall be subject to the  satisfaction  of the following
conditions, or to the waiver thereof by Shareholders before the Closing Date:

5.1.1.  Representations  and  Warranties  of  Key  True  at  Closing  Date.  The
representations and warranties of Key herein contained shall be, in all material
respects, true as of and at the Closing Date with the same effect as though made
at such date,  except as affected by  transactions  permitted or contemplated by
this Agreement; Key shall have performed and complied, in all material respects,
with all covenants  required by this  Agreement to be performed or complied with
by Key before the Closing Date; and Key shall have delivered to the Shareholders
a  certificate,  dated the Closing Date and signed by its vice president and its
secretary, to such effect.

5.1.2. No Material  Litigation.
No suit,  action,  or other proceeding shall be pending,  or to Key's knowledge,
threatened,  before any court or governmental  agency in which it will be, or it
is, sought to restrain or prohibit or to obtain  damages or provide other relief
in  connection  with this  Agreement  or the  consummation  of the  transactions
contemplated  hereby or which might result in a material  adverse  change in the
value of the consolidated assets and business of Key.

5.1.3.  Opinion of Key  Counsel.
The  Shareholders  shall have  received  a  favorable  opinion,  dated as of the
Closing  Date,  from  Porter &  Hedges,  L.L.P.,  counsel  for Key,  in form and
substance satisfactory to the Shareholders,  to the effect that (i) Key has been
duly  incorporated  and is validly  existing as a  corporation  in good standing
under the laws of the State of Maryland; (ii) all corporate proceedings required
to be  taken  by or on the  part  of Key to  authorize  the  execution  of  this
Agreement and the  implementation of the transactions  contemplated  hereby have
been taken;  (iii) the shares of Key Common  Stock which are to be  delivered in
accordance with this Agreement will, when issued, be validly issued,  fully paid
and  nonassessable  outstanding  securities of Key; (iv) this Agreement has been
duly executed and delivered by, and is the legal,  valid and binding  obligation
of Key and is enforceable  against Key in accordance  with its terms,  except as
enforceability   may  be  limited  by  (a)   equitable   principles  of  general
applicability  or  (b)  bankruptcy,   insolvency,   reorganization,   fraudulent
conveyance  or similar  laws  affecting  the rights of creditors  generally.  No
opinion  need  be  expressed  as to the  enforceability  of any  indemnification
provisions of this Agreement.  In rendering such opinion,  such counsel may rely
upon (i)  certificates of public  officials and of officers of Key as to matters
of fact and (ii) the opinion or opinions of other counsel,  which opinions shall
be reasonably satisfactory to the Shareholders, as to matters other than federal
or Texas law.

5.1.4.  Consent of  Certain  Parties in  Privity  With Key.  The  holders of any
material  indebtedness  of Key, the lessors of any material  property  leased by
Key, and the other parties to any other  material  agreements to which Key are a
party shall,  when and to the extent necessary in the reasonable  opinion of the
Shareholders, have consented to the transactions contemplated hereby.

5.1.5.  Employment  Agreements.
Yale E. Key (a  subsidiary of Key) shall have executed and entered into with the
Shareholders employment agreements described in Section 7.2 hereof.

5.1.6.  Real Estate  Agreements.

5.2.  Conditions  Precedent  to  Obligations  of  Key.
The  obligation of Key to consummate  and effect the  transactions  contemplated
hereunder shall be subject to the satisfaction of the following  conditions,  or
to the waiver thereof by Key before the Closing Date.

5.2.1.  Representations and Warranties of Shareholders True at Closing Date. The
representations and warranties of the Shareholders herein contained shall be, in
all material  respects,  true as of and at the Closing Date with the same effect
as though made at such date,  except as affected by  transactions  permitted  or
contemplated by this Agreement;  Cobra and the Shareholders shall have performed
and  complied in all  material  respects,  with all  covenants  required by this
Agreement to be performed or complied with by them before the Closing Date;  and
Cobra and the Shareholders each shall have delivered to Key a certificate, dated
the  Closing  Date  and  signed  by  each  of the  Shareholders  and by  Cobra=s
president, chief financial or accounting officer, and secretary, as the case may
be, to such effects.

5.2.2. No Material  Litigation.
No suit,  action, or other proceeding shall be pending,  or to the Shareholders=
knowledge,  threatened, before any court or governmental agency in which it will
be, or it is,  sought to  restrain  or  prohibit  or to obtain  damages or other
relief in connection with this Agreement or the consummation of the transactions
contemplated  hereby or which might result in a material  adverse  change in the
value of the assets and business of Cobra.

5.2.3.  Opinion of  Counsel.
Key shall have received a favorable opinion, dated the Closing Date, from Lynch,
Chappell & Alsup, a Professional  Corporation,  counsel to the Shareholders,  in
form and  substance  satisfactory  to Key, to the effect that (i) Cobra has been
duly  incorporated  and is validly  existing as a  corporation  in good standing
under the laws of the state of New Mexico;  (ii) all  outstanding  shares of the
Cobra  Common   Stock  have  been   validly   issued  and  are  fully  paid  and
nonassessable; and (iii) this Agreement has been duly executed and delivered by,
and is the  legal,  valid and  binding  obligation  of the  Shareholders  and is
enforceable against the Shareholders in accordance with its terms, except as the
enforceability   may  be  limited  by  (a)   equitable   principles  of  general
applicability  or  (b)  bankruptcy,   insolvency,   reorganization,   fraudulent
conveyance  or similar  laws  affecting  the rights of creditors  generally.  No
opinion  need  be  expressed  as to the  enforceability  of any  indemnification
provisions of this Agreement.  In rendering such opinion,  such counsel may rely
upon (i)  certificates  of  public  officials  and of  officers  of Cobra or the
Shareholders  as to matters of fact and (ii) on the opinion or opinions of other
counsel,  which opinions shall be reasonably  satisfactory to Key, as to matters
other than federal or Texas law.

5.2.4. Consent of Certain Parties in Privity with Cobra or the Shareholders. The
holders of any material  indebtedness of Cobra or the Shareholders,  the lessors
of any  material  property  leased by Cobra or the  Shareholders,  and the other
parties to any other material  agreements to which Cobra or the Shareholders are
a party shall,  when and to the extent  necessary in the  reasonable  opinion of
Key, have consented to the transaction contemplated hereby.

5.2.5.   Employment   Agreements.
The  Shareholders  shall  have  executed  and  entered  into with Yale E. Key (a
subsidiary of Key) their respective  employment  Agreements described in Section
7.2 hereof.

5.2.6.   Real   Estate   Agreements.
The Shareholders, or corporations owned by the Shareholders, shall have conveyed
to Cobra the real estate  described on Schedule 5.1.6 under terms  acceptable to
Key.

5.2.7.  Completion  of  Due  Diligence.
Key shall have  completed  and have been  satisfied  with the results of its due
diligence review of Cobra and its operations.

5.2.8.   Environmental   Restoration.
Notwithstanding the  representations and warranties  contained in Section 2.1.17
hereof,  and  notwithstanding  the  provisions  of Section  8.1 which  limit the
Shareholders=  indemnification obligations to liabilities in excess of $150,000,
the  Shareholders  agree that if Key in good faith within 60 days of the Closing
Date  determines  that  restoration  activities  are required to  eliminate  any
material  environmental  problem  resulting in any  violation of any  Applicable
Environmental  Laws that may exist as a result of the  underground  storage tank
that once existed at the property known as the Jal Yard and further described on
Schedule  2.1.17.1 hereof,  then Cobra will conduct such restoration  activities
for  the  account  of  the  Shareholders  who  will  reimburse  Cobra  for  such
restoration costs within 30 days of receipt of the invoice relating thereto.  As
used herein,  Arestoration costs@ shall include, but not be limited to, the cost
of all investigations performed to determine that restoration activities must be
performed.

                                    ARTICLE 6
                          Termination and Abandonment

6.1.  Termination.
Anything  contained  in this  Agreement to the  contrary  notwithstanding,  this
Agreement  may be  terminated  and the  purchase  and sale  contemplated  hereby
abandoned at any time before the Closing Date:

6.1.1.  By Mutual Consent.
 By mutual consent of Key and the Shareholders.

6.1.2.  By Key Because of Failure to Perform  Agreements  or  Conditions
        Precedent
By Key, if the  Shareholders  have failed to perform any material  agreement set
forth in Sections 4.1 or 4.2, or if any material  condition set forth in Section
5.2 hereof has not been met, and such condition has not been waived.

6.1.3.  By the  Shareholders  Because  of Key=s  Failure  to  Perform
        Agreements  or  ConditionsPrecedent
By the  Shareholders,  if Key has failed to perform any material  agreement  set
forth in Sections 4.1 or 4.3 hereof,  or if any material  condition set forth in
Section 5.1 hereof has not been met, and such condition has not been waived.

6.1.4. By Key or by the Shareholders Because of Legal Proceedings. By either Key
or the Shareholders if any suit, action, or other proceeding shall be pending or
threatened by the federal or a state government before any court or governmental
agency,  in which it is sought to restrain,  prohibit,  or otherwise  affect the
consummation of the transactions contemplated hereby.

6.1.5. By Key Because of a Material  Adverse  Change.
By Key if there has been a material adverse change in the financial condition or
business of Cobra since the Balance Sheet Date.

6.1.6.  By the  Shareholders  Because  of a Material  Adverse  Change.
By the Shareholders if there has been a material adverse change in the financial
condition or business of Key since September 30, 1996.

6.1.7.  By Key or by the  Shareholders  if No Closing by January  15,  1997.  By
either  Key or the  Shareholders,  if the  Closing  of  the  purchase  and  sale
contemplated  hereby shall not have been  consummated  on or before  January 15,
1997  through  no  fault of any  party  hereto;  provided,  however,  that  this
Agreement  may  not  be  terminated  by any  party  hereto  if the  transactions
contemplated hereby have not occurred due to the breach of any provision of this
Agreement by the party desiring to terminate this Agreement.

6.2.  Effect of  Termination.
In the event of the termination  and  abandonment of this Agreement  pursuant to
and in  accordance  with the  provisions of Section 6.1 hereof,  this  Agreement
shall become void and have no effect,  without any  liability on the part of any
party  hereto  (or its  stockholders  or  controlling  persons or  directors  or
officers),  except as otherwise provided in this Agreement;  provided,  however,
that a termination of this Agreement shall not relieve any party hereto from any
liability  for  damages  incurred  as a result of a breach by such  party of its
representations,   warranties,   covenants,  agreements,  or  other  obligations
hereunder, occurring before such termination.

6.3. Waiver of  Conditions.
Subject  to the  requirements  of any  applicable  law,  any  of  the  terms  or
conditions  of this  Agreement  may be waived at any time by the party  which is
entitled to the benefit thereof.

6.4.  Expense  on  Termination.
If  the  transactions  contemplated  hereby  are  abandoned  pursuant  to and in
accordance with the provisions of Section 6.1 hereof,  all expenses will be paid
by the party incurring them.
                                    ARTICLE 7
                              Additional Agreements

7.1.  Forgiveness  of  Notes.
At or before Closing, the Shareholders agree to forgive or convert to capital of
Cobra all  principal  and any  accrued  but  unpaid  interest  on those  certain
unsecured  promissory notes made by Cobra and reflected on the Unaudited Balance
Sheet and held by Michael  McDermett  and Georgia  McDermett,  which  promissory
notes  are in the  original  principal  amount  of  $1,000,000  and are  further
described on Schedule 7.1 hereof.

7.2.  Employment  Agreements.
At the Closing, the Shareholders each agree to execute and enter into employment
agreements  with Yale E. Key, Inc., a subsidiary of Key,  pursuant to which each
of the  Shareholders  agree to work  full  time at Cobra  for one year  past the
Closing  Date.  Such  employment  agreements  shall each include  noncompetition
agreements  satisfactory to Key pursuant to which each of the Shareholders agree
not to compete with Yale E. Key (or any of its  affiliates)  for five years from
the Closing Date in the geographic area covering Texas and New Mexico.

7.3.  Registration Rights.

7.3.1.  Agreement to Register  Resales
Key agrees that no later than April 3, 1997, it will file with the Commission on
Form S-3,  or if Form S-3 is not  available  to Key,  on such  other  form as is
available to Key for  registration of its securities under the Securities Act, a
shelf  registration  statement  pursuant to Rule 415 of the  Securities Act (the
AShelf   Registration   Statement@)   covering  the  offer  and  resale  by  the
Shareholders  of all the Key Shares  and will use its best  efforts to cause the
Shelf  Registration  Statement  to be declared  effective by July 3, 1997 by the
Commission.

7.3.2.  Effectiveness of Shelf Registration Statement Key agrees to maintain the
Shelf  Registration  Statement in effect for the maximum period  allowable under
the  regulations  promulgated by the  Commission;  provided that if such maximum
period is less than three  years from the  Closing  Date and if as of the end of
such  maximum  period  not all of the Key  Shares  registered  under  the  Shelf
Registration Statement have been sold, then within 10 days after the end of such
maximum period Key shall file either a post-effective  amendment to the existing
Shelf Registration  Statement or a new Shelf Registration Statement covering the
offer and resale by the  Shareholders of all Key Shares not previously sold, and
Key will use its  best  efforts  to  cause  the  same to be  declared  effective
promptly by the Commission and will maintain such Shelf  Registration  Statement
in effect until the third  anniversary  of the Closing  Date.  In addition,  Key
shall amend the Shelf  Registration  Statement  and  supplement  the  prospectus
included  therein as and when required by Form S-3 or the applicable form, or by
the Securities Act.

7.3.3.  Blue Sky  Qualification.
In any  offering  pursuant  to this  Section,  Key will use its best  efforts to
effect  any  such   registration  and  use  its  best  efforts  to  effect  such
qualification  and  compliance  as  may  be  required  and as  would  permit  or
facilitate  the  resale  of such  Key  Shares,  including,  without  limitation,
registration  under  the  Securities  Act,   appropriate   qualifications  under
applicable blue-sky or other state securities laws and,  appropriate  compliance
with any other governmental requirements.

7.3.4.  Registration  Expenses.
All expenses (except for any legal fees for the Shareholders=  counsel) relating
to the registration of the Key Shares pursuant to this Agreement (including, but
not limited to, the expenses of any  qualifications  under the blue-sky or other
state securities laws and compliance with governmental requirements of preparing
and filing any post-effective  amendments or prospectus supplements required for
the lawful  distribution of the Key Shares to the public in connection with such
registration) will be paid by Key.

7.3.5.  Preparation;   Reasonable  Investigation.
Key will give the Shareholders the opportunity to participate in the preparation
of the Shelf Registration  Statement,  each prospectus included therein or filed
with the Commission,  and each amendment thereof or supplement thereto, and will
give  the   Shareholders   such  access  to  its  books  and  records  and  such
opportunities  to  discuss  the  business  of Key  with  its  officers  and  the
independent  public  accountants who have certified its financial  statements as
shall be necessary to conduct a reasonable  investigation  within the meaning of
the Securities Act.

7.3.6.  Rights  Non-Transferable.
The registration rights provided by this Section 7.3 are for the sole benefit of
the  Shareholders,  are  personal in nature,  and shall not be  available to any
subsequent holder of the Key Shares.

7.3.7.  Undertaking  to File  Reports and Cooperate in Rule 144 and Rule 145
        Transactions.
For as long as the  Shareholders  are  subject  to Rule  144 or Rule  145 of the
Securities  Act  with  respect  to the  Key  Shares,  Key  will  use  reasonable
commercial  efforts  to timely  file all  annual,  quarterly  and other  reports
required to be filed by it under Section 13 or 15(d) of the Exchange Act and the
rules and  regulations  of the  Commission  thereunder,  as amended from time to
time. If the  Shareholders  propose to sell any Key Shares  pursuant to Rule 144
and 145, Key shall cooperate with the Shareholders so as to enable such sales to
be  made  in  accordance  with  applicable  laws,  rules  and  regulations,  the
requirements  of Key's transfer  agent,  and the reasonable  requirements of the
broker through which the sales are proposed to be executed. Without limiting the
generality of the foregoing,  Key shall,  upon request,  furnish with respect to
each such sale (i) a written statement certifying that Key has complied with the
public information requirements of Rule 144 and 145 and (ii) an opinion of Key's
counsel  regarding such matters as Key's  transfer  agent or such  stockholder's
broker may reasonably desire to confirm.

7.4.  Further  Assurances.
From time to time, as and when  requested by any party  hereto,  any other party
hereto shall execute and deliver,  or cause to be executed and  delivered,  such
documents and instruments and shall take, or cause to be taken,  such further or
other actions as may be  reasonably  necessary to  effectuate  the  transactions
contemplated hereby.

7.5. Cobra Employees`.
The  Shareholders  will use their reasonable best efforts to make all of Cobra=s
employees  remain in the  employment  of Cobra as of the  Closing  Date.  On the
Closing  Date,  Yale E.  Key,  Inc.  (a  subsidiary  of Key) will  continue  the
employment of the Cobra employees. All such employees hired by Yale E. Key shall
be entitled to participate in Yale E. Key=s  employee  benefit plans,  including
Yale E. Key=s medical plan,  and shall  receive full credit  thereunder  for all
purposes for their years of service at Cobra.  With  respect to any  preexisting
condition,  limitations or similar provisions contained in Yale E. Key=s medical
plan,  service  with Cobra shall be treated as service with Yale E. Key, and for
the purpose of determining  deductibles,  copayments and out-of-pocket  maximums
under Yale E. Key=s plans for 1997,  such former Cobra  employees shall be given
credit under Yale E. Key=s medical plan for any back deductibles, copayments and
out-of-pocket  maximums made by a former Cobra employee or his or her dependents
with respect to coverage  under the medical plan sponsored by Cobra during 1997.
Notwithstanding  the  foregoing,  only those Cobra  employees who are covered by
Cobra=s  medical plan as of the Closing Date shall be entitled to participate in
Yale E. Key=s medical plan after the Closing Date; provided,  however, that Yale
E. Key, may, in its  discretion,  with any or all of Cobra employees who are not
covered by Cobra=s  medical  plan  allow  them to  participate  in Yale E. Key=s
medical plan, subject to the terms and conditions thereof.

7.6.  Noncompetition.
Each of the Shareholders agrees that for a period of five years from the Closing
Date, such  Shareholder will not,  directly or indirectly,  acting alone or as a
member  of a  partnership  or as an  officer,  director,  employee,  consultant,
representative,  holder of, or investor in as much as 3% of any  security of any
class of any corporation or other business entity (i) engage in competition with
the business or businesses conducted by Cobra, Key or any affiliate of Key as of
the Closing Date, or in any service  business the services of which are provided
and marketed by Cobra,  Key or any  affiliate of Key as of the Closing  Date, in
New Mexico or Texas; (ii) request any present customers or suppliers of Cobra to
curtail or cancel their business with Cobra,  Key or any affiliate of Key; (iii)
disclose  to  any  person,   firm  or  corporation   any  trade,   technical  or
technological  secrets of Cobra,  Key or any  affiliate of Key or any details of
their  organization  or business  affairs or (iv) induce or actively  attempt to
influence  any employee of Cobra,  Key or any  affiliate of Key to terminate his
employment. Each of the Shareholders agrees that if either the length of time or
geographical area set forth in this Section 7.6 is deemed too restrictive in any
court proceeding, the court may reduce such restrictions to those which it deems
reasonable under the  circumstances.  The obligations  expressed in this Section
7.6 are in  addition to any other  obligations  that the  Shareholders  may have
under the laws of the State of New Mexico requiring an employee of a business or
a shareholder who sells his stock in a corporation (including a disposition in a
merger) to limit his  activities so that the goodwill and business  relations of
his employer and of the  corporation  whose stock he has sold (and any successor
corporation) will not be materially  impaired.  Each of the Shareholders further
agrees and  acknowledges  that  Cobra,  Key and its  affiliates  do not have any
adequate remedy at law for the breach of threatened  breach by such  Shareholder
of this  covenant,  and agree that Cobra,  Key or any  affiliate  of Key may, in
addition to the other  remedies  which may be available to it hereunder,  file a
suit in equity to enjoin such Shareholder from such breach or threatened breach.
If any  provisions of this Section 7.6 are held to be invalid or against  public
policy the  remaining  provisions  shall not be  affected  thereby.  Each of the
Shareholders  acknowledges  that the covenants set forth in this Section 7.6 are
being  executed  and  delivered  by such  Shareholder  in  consideration  of the
covenants of Key  contained in this  Agreement,  and for other good and valuable
consideration, receipt of which is hereby acknowledged.

7.7. Stock Certificate  Issuance.
Key  shall  file an  additional  listing  application  with the  American  Stock
Exchange  requesting  the  listing of the Key Shares.  On the date Key  receives
notice of approval of such request,  Key shall send written  instructions to its
transfer  agent and  registrar  to issue,  countersign  and register one or more
certificates  representing  the Key Shares in the names of the  Shareholders  in
accordance  with written  instructions  signed by each of the  Shareholders  and
deliver such  certificate(s)  to the  Shareholders  at the address  specified in
Section 9.5 hereof.

7.8.  Releases.
Following the Closing, Key agrees to repay in full the loan which Cobra has with
the Small Business  Administration  and is listed on Schedule  2.1.8.13  hereof.
With  regard to any other  indebtedness  of Cobra  which the  Shareholders  have
personally  guaranteed,  after  the  Closing,  Key and  Cobra  shall  use  their
reasonable  efforts  to  secure  the  release  of any  personal  guaranties  the
Shareholders have made with respect to Cobra=s indebtedness;  provided, however,
neither Key nor Cobra shall have any obligation to prepay any such  indebtedness
in order to secure such releases.

                                    ARTICLE 8
                                 Indemnification

8.1.  Indemnification  by the  Shareholders.
In addition to an other remedies  available to Key under this  Agreement,  or at
law  or in  equity,  each  of  the  Shareholders  shall  jointly  and  severally
indemnify, defend and hold harmless Key, and its officers, directors, employees,
agents, and stockholders, against and with respect to any and all claims, costs,
damages, losses, expenses, obligations,  liabilities,  recoveries, suits, causes
of  action  and  deficiencies,  including  interest,  penalties  and  reasonable
attorneys=   fees  and   expenses  in  excess  of  $150,000  in  the   aggregate
(collectively, the ADamages@) that such indemnitees shall incur or suffer, which
arise,  result from or relate to any breach of, or failure by, the  Shareholders
to  perform,  their  respective   representations,   warranties,   covenants  or
agreements in this Agreement or in any schedule,  certificate,  exhibit or other
instrument  furnished  or  delivered  to  Key  by the  Shareholders  under  this
Agreement;  provided however,  that the Shareholders=  aggregate  obligations to
indemnify  Key and the other  parties  identified  above shall never  exceed the
aggregate sum of $7,100,000;  further provided,  however,  that the Shareholders
shall not be  required to so  indemnity,  defend and hold  harmless  Key and its
officers,  directors,  employees,  agents  and  stockholders,  against  and with
respect  to  any  Damages  incurred  as a  result  of a  breach  by  any  of the
Shareholders  of  their  respective   representations  and  warranties  in  this
Agreement or in any schedule, certificate, exhibit or other instrument furnished
or delivered to Key by any of the  Shareholders  under this  Agreement for which
Key  fails  to  provide  written  notice  of a claim  for  such  Damages  to the
Shareholders on or before the expiration of the survival period (as specified in
Section 9.2 hereof) of the specific  representation  or warranty alleged to have
been breached.

8.2.  Indemnification  by Key.
In addition  to any other  remedies  available  to the  Shareholders  under this
Agreement, or at law or in equity, Key shall indemnify, defend and hold harmless
each of the  Shareholders  against and with  respect to any and all Damages that
such indemnitees  shall incur or suffer,  which arise,  result from or relate to
any  breach  of,  or  failure  by Key to  perform,  any of its  representations,
warranties,  covenants  or  agreements  in this  Agreement  or in any  schedule,
certificate,   exhibit  or  other  instrument  furnished  or  delivered  to  the
Shareholders  by or on behalf of Key under this  Agreement;  provided,  however,
that Key shall not be required to so  indemnify,  defend and hold  harmless  the
Shareholders  and their  employees  and agents  against and with  respect to any
Damages  incurred  as a result of a breach by Key of any of its  representations
and  warranties in this  Agreement or in any schedule,  certificate,  exhibit or
other  instrument  furnished or delivered to the  Shareholders by Key under this
Agreement for which the  Shareholders  fail to provide written notice of a claim
for such Damages to Key on or before the  expiration of the survival  period (as
is specified in Section 9.2 hereof) of the specific  representations or warranty
alleged to have been breached.

8.3.  Additional  Indemnification  by Key.
In addition,  Key will  indemnify,  defend and hold  harmless  the  Shareholders
against  any  claims to which the  Shareholders  may  become  subject  under the
Securities  Act or otherwise,  insofar as such claims (or actions or proceedings
whether  commenced or threatened,  in respect thereof) arise out of or are based
upon any untrue  statement or alleged  untrue  statement  of any  material  fact
contained in the Shelf Registration Statement, any preliminary prospectus, final
prospectus  or  summary  prospectus  contained  therein,  or  any  amendment  or
supplement  thereto,  or any  omission or alleged  omission  to state  therein a
material fact required to be stated  therein or necessary to make the statements
therein not misleading, and Key will reimburse the Shareholders for any legal or
any other expenses  reasonably incurred by them in connection with investigating
or  defending  any such claim (or  action or  proceeding  in  respect  thereof);
provided  that Key shall not be  liable  in any such case to the  extent  that a
claim (or action or  proceeding  in respect  thereof)  arises out of or is based
upon an untrue  statement  or alleged  untrue  statement  or omission or alleged
omission  made  in such  Shelf  Registration  Statement,  any  such  preliminary
prospectus,  final prospectus,  summary  prospectus,  amendment or supplement in
reliance upon and in conformity with written information furnished to Key, in an
instrument duly executed by the Shareholders specifically stating that it is for
use in the preparation thereof.

8.4.  Indemnification  Procedures.
If any party hereto discovers or otherwise  becomes aware of a claim for Damages
arising under this Article 8, such  indemnified  party shall give written notice
to the indemnifying  party,  specifying such claim, and may thereafter  exercise
any remedies  available to such party under this Agreement;  provided,  however,
that the failure of any  indemnified  party to give  notice as  provided  herein
shall not relieve the indemnifying  party of any obligations  hereunder,  to the
extent the indemnifying  party is not materially  prejudiced  thereby.  Further,
promptly  after receipt by an indemnified  party  hereunder of written notice of
the  commencement  of any action or proceeding with respect to which a claim for
Damages arising under this Article 8 may be made, such indemnified  party shall,
if a claim in respect thereof is to be made against any indemnifying party, give
written  notice to the  latter of the  commencement  of such  action;  provided,
however,  that the failure of any  indemnified  party to give notice as provided
herein shall not relieve the indemnifying party of any obligations hereunder, to
the extent the indemnifying party is not materially  prejudiced thereby. In case
any such action is brought against an indemnified  party, the indemnifying party
shall be entitled to participate in and to assume the defense  thereof,  jointly
with any other indemnifying party similarly notified,  to the extent that it may
wish, with counsel reasonably  satisfactory to such indemnified party, and after
such  notice  from  the  indemnifying  party  to such  indemnified  party of its
election so to assume the defense thereof,  the indemnifying  party shall not be
liable to such  indemnified  party for any legal or other expenses  subsequently
incurred  by the  latter in  connection  with the  defense  thereof  unless  the
indemnifying  party has failed to assume the defense of such claim and to employ
counsel  reasonably  satisfactory to such  indemnified  person.  An indemnifying
party who elects not to assume  the  defense of a claim  shall not be liable for
the fees and  expenses of more than one counsel in any single  jurisdiction  for
all parties indemnified by such indemnifying party with respect to such claim or
with respect to claims separate but similar or related in the same  jurisdiction
arising  out  of  the  same  general  allegations.  Notwithstanding  any  of the
foregoing to the contrary,  the indemnified party will be entitled to select its
own  counsel  and assume the  defense  of any action  brought  against it if the
indemnifying  party  fails to  select  counsel  reasonably  satisfactory  to the
indemnified  party,  and the  expenses  of  such  defense  shall  be paid by the
indemnifying party. No indemnifying party shall consent to entry of any judgment
or enter into any settlement  with respect to a claim without the consent of the
indemnified party, which consent shall not be unreasonably  withheld,  or unless
such judgment or settlement includes as an unconditional term thereof the giving
by the  claimant or plaintiff  to such  indemnified  party of a release from all
liability  with respect to such claim.  No  indemnified  party shall  consent to
entry of any  judgment  or enter into any  settlement  of any such  action,  the
defense of which has been assumed by an indemnifying party,  without the consent
of such indemnifying party, which consent shall not be unreasonably withheld.

                                    ARTICLE 9
                                  Miscellaneous

9.1.  Press  Releases.
The  Shareholders  agree that they will not cause or permit  Cobra to,  make any
public  statement or announcement  concerning this Agreement or the transactions
contemplated  herein without the prior consent of Key, subject,  however, to the
right of any  party to make  such an  announcement  when in the  opinion  of its
counsel such public statement or announcement is legally required.

9.2. Survival of Representations,  Warranties and Covenants. All representations
and  warranties  made by the  parties  hereto  shall  survive for a period of 24
months from the Closing Date,  notwithstanding  any investigation  made by or on
behalf of any of the parties hereto; provided, however, that the representations
and  warranties  contained  in Section  2.1.11  hereof shall  survive  until the
expiration of the applicable statute of limitations associated with the taxes at
issue. All statements contained in any certificate,  schedule,  exhibit or other
instrument  delivered  pursuant to this  Agreement  shall be deemed to have been
representations  and warranties by the respective party or parties,  as the case
may be, and shall also  survive for a period of 24 months from the Closing  Date
despite  any  investigation  made by any  party  hereto  or on its  behalf.  All
covenants and agreements contained herein shall survive as provided herein.

9.3.  Entirety.
This Agreement  embodies the entire  agreement among the parties with respect to
the subject matter  hereof,  and all prior  agreements  between the parties with
respect thereto are hereby superseded in their entirety.

9.4.  Counterparts.
Any number of  counterparts  of this  Agreement  may be  executed  and each such
counterpart  shall  be  deemed  to be  an  original  instrument,  but  all  such
counterparts together shall constitute but one instrument.

9.5.  Notices  and  Waivers.
Any notice or waiver to be given to any party  hereto  shall be in  writing  and
shall be delivered by courier,  sent by  facsimile  transmission  or first class
registered or certified mail, postage prepaid, return receipt requested.
If    to    Key:     -----------------------------------------------------------
- --------------------------------------------------------
Addressed            to:           With           a           copy           to:
- -----------------------------------------------------------
- --------------------------------------------------------
- -----------------------------------------------------------
- --------------------------------------------------------
Key Energy Group, Inc.                               Porter & Hedges, L.L.P.
Two Tower Center, Tenth Floor                        700 Louisiana, 35th Floor
East Brunswick, New Jersey 08816                     Houston, Texas 77210-4744
Attention: Jack D. Loftis                            Attention: Samuel N. Allen
Facsimile:  (908) 247-5148                           Facsimile:  (713) 228-1331

- ----------------------------------- --------------------------------------------
                             If to any Shareholder:

- -------------------------------- -----------------------------------------------

Addressed to:                                               With a copy to:
- ----------------------------------- --------------------------------------------
- ----------------------------------- --------------------------------------------

Michael and Georgia McDermett            Lynch, Chappell & Alsup, a Professional
P.O. Box 9504                            Corporation
Midland, Texas 79708-9504                Attention:  James M. Alsup
                                         The Summit, Suite 700
                                         300 North Marienfeld
                                         Midland, Texas 79701
                                         Facsimile: (915) 683-2587
- ----------------------------------- --------------------------------------------

Any communication so addressed and mailed by first-class registered or certified
mail,  postage  prepaid,  with return receipt  requested,  shall be deemed to be
received on the third business day after so mailed,  and if delivered by courier
or facsimile to such address,  upon delivery during normal business hours on any
business day.

9.6 Table  of Contents and Captions.
The table of contents and captions  contained in this  Agreement  are solely for
convenient  reference  and  shall  not  be  deemed  to  affect  the  meaning  or
interpretation of any article, section, or paragraph hereof.

9.7.  Knowledge.
When the term  Aknowledge@ is used in this Agreement,  it shall mean the current
and  actual  knowledge  of the  person  or  entity to which  such  knowledge  is
attributable.

9.8.  Successors  and  Assigns.
This  Agreement  shall be binding  upon and shall inure to the benefit of and be
enforceable by the successors and assigns of the parties hereto.

9.9.  Severability.
If any term,  provision,  covenant or restriction of this Agreement is held by a
court of competent  jurisdiction  to be invalid,  void,  or  unenforceable,  the
remainder of the terms,  provisions,  covenants and restrictions shall remain in
full force and effect and shall in no way be affected,  impaired or invalidated.
It is hereby  stipulated  and  declared to be the  intention of the parties that
they  would  have  executed  the  remaining  terms,  provisions,  covenants  and
restrictions  without  including  any of such  which may be  hereafter  declared
invalid, void or unenforceable.

9.10.  Applicable  Law.
This  Agreement  shall be governed by and  construed  and enforced in accordance
with the applicable laws of the State of Texas.

IN WITNESS WHEREOF,  the  Shareholders  have executed this Agreement and Key has
caused this Agreement to be signed in its corporate name by its duly  authorized
representative, all as of the day and year first above written.
                             Key Energy Group, Inc.


                                           By:
                                           C. Ron Laidley, Vice President



                                           Shareholders



                                           Michael McDermett



                                           Georgia McDermett

- --------------------------------------------------------------------------------


I:\PBOOKER\JMA\Key Energy Group\Cobra Stock Purchase Agreement.wpd

                                  SCHEDULE 3.4

                   KEY SEC DOCUMENTS OF KEY ENERGY GROUP, INC.


1. Form 10-K. Annual Report of Key Energy Group, Inc. for fiscal year ended June
30,  1996.  2. Form 10-Q.  Quarterly  Report of Key Energy  Group,  Inc. for the
quarterly  period ended  September 30, 1996. 3. Form 8-K.  Current Report of Key
Energy  Group,  Inc.,  dated July 3, 1996.  4. Form 8-K.  Current  Report of Key
Energy Group,  Inc.,  dated September 16, 1996. 5. Notice of 1996 Annual Meeting
of Stockholders to be held on December 9, 1996; and Proxy Statement for the 1996
Annual  Meeting of  Stockholders  to be held on  December  9, 1996.  6.  Private
Offering   Memorandum,   dated  June  28,  1996,   relating  to  7%  Convertible
Subordinated Debentures Due 2003.

                                                         v
I:\PBOOKER\JMA\Key Energy Group\Cobra Stock Purchase Agreement.wpd
                                                  Table of Contents


                                                                        Page No.

ARTICLE 1Purchase and Sale.....................................................1
1.1.     Purchase and Sale of Cobra Shares.....................................1
1.2.     Time and Place of Closing.............................................1

ARTICLE 2         Representations and Warrantiesof the Shareholders............2
2.1.     Representations and Warranties of the Shareholders....................2
         2.1.1.   Organization and Standing....................................2
         2.1.2.   Agreement Authorized and its Effect on Other Obligations.....2
         2.1.3.   Capitalization of Cobra......................................2
         2.1.4.   Ownership of Cobra Shares....................................3
         2.1.5.   No Subsidiaries..............................................3
         2.1.6.   Financial Statements.........................................3
         2.1.7.   Liabilities..................................................3
         2.1.8.   Additional Information.......................................4
                  2.1.8.1  Real Estate.........................................4
                  2.1.8.2  Machinery and Equipment.............................4
                  2.1.8.3  Receivables.........................................4
                  2.1.8.4  Payables............................................4
                  2.1.8.5  Insurance...........................................4
                  2.1.8.6  Contracts...........................................4
                  2.1.8.7  Employee Compensation Plans.........................4
                  2.1.8.8  Certain Salaries....................................5
                  2.1.8.9  Bank Accounts.......................................5
                  2.1.8.10  Employee Agreements................................5
                  2.1.8.11  Intellectual Property..............................5
                  2.1.8.12  Trade Names........................................5
                  2.1.8.13  Promissory Notes...................................5
                  2.1.8.14  Guaranties.........................................5
                  2.1.8.15  Leases.............................................5
                  2.1.8.16  Environment........................................5
         2.1.9.   No Defaults..................................................5
         2.1.10.  Absence of Certain Changes and Events........................6
                  2.1.10.1  Financial Change...................................6
                  2.1.10.2  Property Damage....................................6
                  2.1.10.3  Dividends..........................................6
                  2.1.10.4  Capitalization Change..............................6
                  2.1.10.5  Labor Disputes.....................................6
                  2.1.10.6  Other Material Changes.............................6
         2.1.11.  Taxes........................................................6
         2.1.12.  Intellectual Property........................................7
         2.1.13.  Title to and Condition of Assets.............................7
         2.1.14.  Contracts....................................................8
         2.1.15.  Licenses and Permits.........................................8
         2.1.16.  Litigation...................................................8
         2.1.17.  Environmental Compliance.....................................8
                  2.1.17.1  Environmental Conditions...........................8
                  2.1.17.2  Permits, etc.......................................9
                  2.1.17.3  Compliance.........................................9
                  2.1.17.4  Past Compliance....................................9
                  2.1.17.5  Environmental Claims...............................9
                  2.1.17.6  Renewals..........................................10
                  2.1.17.7  Asbestos and PCBs.................................10
         2.1.18.  Compliance with Other Laws..................................10
         2.1.19.  No ERISA Plans or Labor Issues; No Penalty for Termination of
                  Employee Compensation Plans.................................10
         2.1.20.  Investigations; Litigation..................................10
         2.1.21.  Absence of Certain Business Practices.......................11
         2.1.22.  Consents and Approvals......................................11
         2.1.23.  Finder=s Fee................................................11
2.2.  Investment Representations..............................................11
         2.2.1.  Shareholders Investment Suitability and Related Matters......11
         2.2.2.  Key Shares Not Registered....................................11
         2.2.3.  Reliance on Representations..................................11
         2.2.4.   Investment Intent...........................................12
         2.2.5.  Permitted Resale.............................................12
         2.2.6.  Investor Sophistication......................................12
         2.2.7.  Availability of Information..................................12
         2.2.8.  Restrictive Legends..........................................12

ARTICLE 3Representations and Warranties of Key................................13
3.1.  Organization and Standing...............................................13
3.2.  Agreement Authorized and its Effect on Other Obligations................13
3.3.  Capitalization..........................................................13
3.4.  Reports and Financial Statements........................................14
3.5.  Absence of Certain Changes and Events in Key............................14
         3.5.1.  Financial Change.............................................14
         3.5.2.  Other Material Changes.......................................14
3.6.   Key=s Compliance with Other Laws.......................................14
3.7.  Consents and Approvals..................................................14
3.8. Investigations; Litigation...............................................15
3.9.  Finder=s Fee............................................................15
3.10.  Key=s Access to Cobra=s Assets and Records.............................15

ARTICLE 4Obligations Pending Closing Date.....................................15
4.1.  Agreements of Key and the Shareholders..................................15
         4.1.1.  Maintenance of Present Business..............................15
         4.1.2.  Maintenance of Properties....................................15
         4.1.3.  Maintenance of Books and Records.............................16
         4.1.4.  Compliance with Law..........................................16
         4.1.5.  Inspection...................................................16
         4.1.6.  Notice of Material Developments..............................16
4.2.  Additional Agreements of the Shareholders...............................17
         4.2.1.  Prohibition of Certain Employment Contracts..................17
         4.2.2.  Prohibition of Certain Loans.................................17
         4.2.3.  Prohibition of Certain Commitments...........................17
         4.2.4.  Disposal of Assets...........................................17
         4.2.5.  Maintenance of Insurance.....................................17
         4.2.6.  Acquisition Proposals........................................17
         4.2.7.  No Amendment to Articles of Incorporation....................18
         4.2.8.  No Issuance, Sale, or Purchase of Securities.................18
         4.2.9.  Prohibition on Dividends.....................................18
4.3.  Agreements of Key.......................................................18
         4.3.1.  No Amendment to Articles of Incorporation....................18
         4.3.2.  Notice of Material Developments..............................18
ARTICLE 5  Conditions Precedent to Obligations................................18
5.1.  Conditions Precedent to Obligations of Shareholders.....................18
         5.1.1.  Representations and Warranties of Key True at Closing Date...18
         5.1.2.  No Material Litigation.......................................19
         5.1.3.  Opinion of Key Counsel.......................................19
         5.1.4.  Consent of Certain Parties in Privity With Key...............19
         5.1.5.  Employment Agreements........................................19
         5.1.6.  Real Estate Agreements.......................................19
5.2.  Conditions Precedent to Obligations of Key..............................20
         5.2.1.  Representations and Warranties of Shareholders True at Closing
                 Date.........................................................20
         5.2.2.  No Material Litigation.......................................20
         5.2.3.  Opinion of Counsel...........................................20
         5.2.4.  Consent of Certain Parties in Privity with Cobra or the
                 Shareholders.................................................20
         5.2.5.  Employment Agreements........................................21
         5.2.6.  Real Estate Agreements.......................................21
         5.2.7.  Completion of Due Diligence..................................21
         5.2.8.  Environmental Restoration....................................21

ARTICLE 6Termination and Abandonment..........................................21
6.1.  Termination.............................................................21
         6.1.1.  By Mutual Consent............................................21
         6.1.2.  By Key Because of Failure to Perform Agreements or Conditions
                 Precedent....................................................21
         6.1.3.  By the Shareholders Because of Key=s Failure to Perform
                 Agreements or Conditions Precedent...........................22
         6.1.4.  By Key or by the Shareholders Because of Legal Proceedings...22
         6.1.5.  By Key Because of a Material Adverse Change..................22
         6.1.6.  By the Shareholders Because of a Material Adverse Change.....22
         6.1.7.  By Key or by the Shareholders if No Closing by January 15,
                 1997.........................................................22
6.2.  Effect of Termination...................................................22
6.3.  Waiver of Conditions....................................................22
6.4.  Expense on Termination..................................................22
6.5   Additional Agreements ..................................................23
7.1.  Forgiveness of Notes....................................................23
7.2.  Employment Agreements...................................................23
7.3.  Registration Rights.....................................................23
         7.3.1.  Agreement to Register Resales................................23
         7.3.2.  Effectiveness of Shelf Registration Statement................23
         7.3.3.  Blue Sky Qualification.......................................23
         7.3.4.  Registration Expenses........................................24
         7.3.5.  Preparation; Reasonable Investigation........................24
         7.3.6.  Rights Non-Transferable......................................24
         7.3.7.  Undertaking to File Reports and Cooperate in Rule 144 and Rule
                  145 Transactions............................................24
7.4.  Further Assurances......................................................24
7.5.  Cobra Employees.........................................................25
7.6.  Noncompetition..........................................................25
7.7.  Stock Certificate Issuance..............................................26
7.8.  Releases................................................................26

ARTICLE 8Indemnification......................................................26
8.1.  Indemnification by the Shareholders.....................................26
8.2.  Indemnification by Key..................................................27
8.3.  Additional Indemnification by Key.......................................27
8.4.  Indemnification Procedures..............................................27

ARTICLE 9Miscellaneous........................................................28
9.1.  Press Releases..........................................................28
9.2.  Survival of Representations, Warranties and Covenants...................28
9.3.  Entirety................................................................29
9.4.  Counterparts............................................................29
9.5.  Notices and Waivers.....................................................29
9.6.  Table of Contents and Captions..........................................29
9.7.  Knowledge...............................................................30
9.8.  Successors and Assigns..................................................30
9.9.  Severability............................................................30
9.10.  Applicable Law.........................................................30