Registration Rights Agreement


                                      among

                             Key Energy Group, Inc.

                              Lehman Brothers Inc.

                                       and

                           McMahan Securities Co. L.P.
 











                         Dated as of September 25, 1997






                          REGISTRATION RIGHTS AGREEMENT

This  Registration  Rights  Agreement  (the  "Agreement")  is entered into as of
September  25,  1997,  among Key Energy  Group,  Inc.  (the  "Company"),  Lehman
Brothers Inc. ("Lehman"), and McMahan Securities Co. L.P. ("McMahan"; Lehman and
McMahan being  hereinafter  referred to as the "Initial  Purchasers"),  who have
agreed to purchase the Company's 5% Convertible Subordinated Notes due 2004 (the
"Notes") pursuant to the Purchase Agreement dated as of September 18, 1997 among
the  Company  and  the  Initial  Purchasers  (the  "Purchase  Agreement").  This
Agreement is being executed pursuant to Section 7(e) of the Purchase  Agreement.
The Notes are convertible  into shares of the Company's  common stock, par value
$.10 per share (the "Common Stock"), under the terms and conditions set forth in
an indenture  dated as of September  25, 1997,  between the Company and American
Stock Transfer & Trust Company, as Trustee (the "Indenture").

The parties hereby agree as follows:

I. Definitions. As used in this Agreement, the following capitalized terms shall
have the following meanings:

Broker-Dealer. Any broker or dealer registered under the Exchange Act.

Business Day. A day other than a Saturday or Sunday or any federal holiday.

Closing Date. The date of this Agreement.

Commission. The Securities and Exchange Commission.

Damages  Payment  Date.  Each  Interest  Payment  Date.  For  purposes  of  this
Agreement,  if no Notes are outstanding,  "Damages Payment Date" shall mean each
March 15 and September 15.

Effectiveness Target Date. As defined in Section 3 hereof.

Exchange Act. The Securities Exchange Act of 1934, as amended.

Holder.  A Person  who owns,  beneficially  or  otherwise,  Transfer  Restricted
Securities.

Indemnified Holder. As defined in Section 6(a) hereof.

Indenture. As defined in the preamble hereto.

Initial Purchasers. As defined in the preamble hereto.

Interest Payment Date. As defined in the Indenture.

Liquidated Damages. As defined in Section 3 hereof.

NASD. National Association of Securities Dealers, Inc.

Notes. As defined in the preamble hereto.

Person. An individual,  partnership,  corporation,  unincorporated organization,
trust, joint venture or a government or agency or political subdivision thereof.

Prospectus.  The prospectus included in a Registration  Statement, as amended or
supplemented by any prospectus  supplement and by all other amendments  thereto,
including post-effective  amendments, and all material incorporated by reference
into such Prospectus.

Record Holder.  With respect to any Damages  Payment Date,  each Person who is a
Holder on the record date with  respect to the  Interest  Payment  Date on which
such  Damages  Payment  Date shall  occur.  In the case of a Holder of shares of
Common Stock issued upon  conversion  of the Notes,  "Record  Holder" shall mean
each Person who is a Holder of shares of Common Stock which constitute  Transfer
Restricted  Securities on the March 1 or September 1  immediately  preceding the
Damages Payment Date.

Registration Default. As defined in Section 3(a) hereof.

Registration  Statement.  The  registration  for resale of  Transfer  Restricted
Securities pursuant to the Shelf Registration Statement, which is filed pursuant
to the  provisions of this  Agreement,  in each case,  including the  Prospectus
included   therein,   all  amendments   and   supplements   thereto   (including
post-effective  amendments)  and  all  exhibits  and  material  incorporated  by
reference therein.

Securities Act. The Securities Act of 1933, as amended.

Shelf Filing Deadline. As defined in Section 2 hereof.

Shelf Registration Statement. As defined in Section 2 hereof.

TIA. The Trust  Indenture  Act of 1939 (15 U.S.C.  Section  77aaa-77bbbb)  as in
effect on the date of the Indenture.

Transfer Restricted Securities.  Each Note and each share of Common Stock issued
upon conversion of Notes until the earlier of (a) the date on which such Note or
such  share  of  Common  Stock  issued  upon  conversion  has  been  effectively
registered under the Securities Act and disposed of in accordance with the Shelf
Registration Statement,  (b) the date on which such Note or such share of Common
Stock issued upon  conversion is distributed to the public  pursuant to Rule 144
under the  Securities  Act or (c) the date on which  such Note or such  share of
Common Stock issued upon conversion may be sold or transferred  pursuant to Rule
144(k) (or any other similar provision then in force).

Underwritten  Registration  or  Underwritten  Offering.  A registration in which
securities  of the  Company are sold to an  underwriter  for  reoffering  to the
public.

2. Shelf Registration.

(a) The Company shall:  (i) as soon as practicable,  but not later than 180 days
after the date hereof (the "Shelf Filing  Deadline"),  cause to be filed a shelf
registration statement pursuant to Rule 415 under the Securities Act (the "Shelf
Registration  Statement"),  which Shelf Registration Statement shall provide for
resales of all Transfer Restricted Securities held by Holders that have provided
the  information  required  pursuant to Section 2(b)  hereof;  (ii) use its best
efforts to cause such Shelf  Registration  Statement to be declared effective by
the  Commission  on or before 270 days after the date hereof;  and (iii) use its
best efforts to keep such Shelf Registration Statement  continuously  effective,
supplemented and amended as required by the provisions of Section 4(b) hereof to
the extent  necessary to ensure that it is available  for resales by the Holders
of Transfer Restricted Securities entitled to the benefit of this Agreement, and
to  ensure  that it  conforms  with  the  requirements  of this  Agreement,  the
Securities  Act and the policies,  rules and  regulations  of the  Commission as
announced  from time to time,  for a period of at least two years  following the
Closing  Date or such  shorter  period  that will  terminate  when all  Transfer
Restricted Securities covered by the Shelf Registration Statement have been sold
pursuant to the Shelf Registration Statement.

(b) No Holder of Transfer Restricted  Securities may include any of its Transfer
Restricted  Securities  in any Shelf  Registration  Statement  pursuant  to this
Agreement  unless and until such  Holder  furnishes  to the  Company in writing,
within 10 Business Days after receipt of a request therefor, such information as
the  Company  may  reasonably  request  for use in  connection  with such  Shelf
Registration  Statement or Prospectus or preliminary Prospectus included therein
and in any  application  to be filed with or under  state  securities  laws.  No
Holder of Transfer Restricted Securities shall be entitled to Liquidated Damages
pursuant to Section 3 hereof  unless and until such Holder  shall have  provided
all such  reasonably  requested  information.  Each Holder as to which any Shelf
Registration  Statement  is being  effected  agrees to furnish  promptly  to the
Company  all  information  required  to  be  disclosed  in  order  to  make  the
information  previously  furnished to the Company by such Holder not  materially
misleading.

3. Liquidated Damages.

(a) If the Shelf  Registration  Statement  required by this Agreement (i) is not
filed with the  Commission  on or before the date  specified  for such filing in
Section 2(a)(i) hereof,  (ii) has not been declared  effective by the Commission
on or before the date  specified  for such  effectiveness  in  Section  2(a)(ii)
hereof (the "Effectiveness  Target Date"), or (iii) subject to the provisions of
Section  4(b)(i) below,  is filed and declared  effective but, during the period
specified in Section 2(a)(ii) hereof,  shall thereafter cease to be effective or
fail to be usable for its intended  purpose  without being  succeeded  within 15
Business Days by a post-effective  amendment to such Registration Statement that
cures such failure and that is itself immediately  declared effective (each such
event  referred  to in  foregoing  clauses (i) through  (iii),  a  "Registration
Default"),  the Company  hereby agrees to pay  liquidated  damages  ("Liquidated
Damages") to (A) each holder of Notes with respect to any period  during which a
Registration  Default shall have occurred and be continuing,  in an amount equal
to three  quarters  of one  percent  (75 basis  points)  per  annum  per  $1,000
principal amount of Notes held by such Holder;  and (B) each Holder of shares of
Common Stock issued upon conversion of Notes with respect to any period in which
a Registration Default shall have occurred and be continuing, in an amount equal
to $.29 per annum per share of Common Stock,  subject to adjustment in the event
of stock splits, stock recombinations, stock dividends and the like.

(b) All accrued  Liquidated  Damages shall be paid to holders of Notes or Record
Holders  by the  Company  on each  Damages  Payment  Date by  wire  transfer  of
immediately available funds or by federal funds check. Following the cure of all
Registration  Defaults relating to any particular Note or share of Common Stock,
the accrual of  Liquidated  Damages with respect to such Note or share of Common
Stock will cease.

4. Registration Procedures.

(a) In  connection  with the Shelf  Registration  Statement,  the Company  shall
comply  with all the  provisions  of  Section  4(b) below and shall use its best
efforts  to  effect  such  registration  to  permit  the  sale  of the  Transfer
Restricted  Securities  being sold in  accordance  with the  intended  method or
methods of  distribution  thereof,  and  pursuant  thereto,  the Company will as
expeditiously  as  possible  prepare  and  file  with  the  Commission  a  Shelf
Registration  Statement  relating to the  registration on any  appropriate  form
under the Securities Act.

(b) In  connection  with the Shelf  Registration  Statement  and any  Prospectus
required by this  Agreement to permit the sale or resale of Transfer  Restricted
Securities, the Company shall:

(i) Use its  best  efforts  to keep  such  Registration  Statement  continuously
effective;  upon  the  occurrence  of  any  event  that  would  cause  any  such
Registration  Statement  or the  Prospectus  contained  therein (A) to contain a
material  misstatement  or  omission or (B) to not be  effective  and usable for
resale of  Transfer  Restricted  Securities  during the period  required by this
Agreement,  the Company  shall file  promptly an  appropriate  amendment to such
Registration  Statement,  in  the  case  of  clause  (A),  correcting  any  such
misstatement or omission,  and, in the case of either clause (A) or (B), use its
reasonable  best efforts to cause such  amendment to be declared  effective  and
such  Registration  Statement  and the related  Prospectus  to become usable for
their intended purposes as soon as practicable  thereafter.  Notwithstanding the
foregoing,  if the Board of  Directors of the Company  determines  in good faith
that it is in the best interests of the Company not to disclose the existence of
or facts  surrounding  any proposed or pending  material  corporate  transaction
involving the Company, the Company may allow the Shelf Registration Statement to
fail to be  effective  and  usable as a result of such  nondisclosure  for (1) a
period not to exceed 30 days in any three month period or (2) two periods not to
exceed an aggregate of 60 days in any twelve month period.

(ii) Prepare and file with the Commission  such  amendments  and  post-effective
amendments  to the  Registration  Statement  as may be  necessary  to  keep  the
Registration  Statement  effective for the period set forth in Section  2(a)(ii)
hereof or such shorter  period as will  terminate  when all Transfer  Restricted
Securities  covered by such  Registration  Statement  have been sold;  cause the
Prospectus to be supplemented by any required Prospectus  supplement,  and as so
supplemented  to be filed pursuant to Rule 424 under the Securities  Act, and to
comply  fully  with the  applicable  provisions  of Rules 424 and 430A under the
Securities  Act in a  timely  manner;  and  comply  with the  provisions  of the
Securities Act with respect to the disposition of all securities covered by such
Registration  Statement  during the  applicable  period in  accordance  with the
intended  method or methods of  distribution by the sellers thereof set forth in
such Registration Statement or supplement to the Prospectus.

(iii) Advise the  underwriter(s),  if any, and selling holders  promptly (but in
any event  within two  Business  Days) and, if  requested  by such  Persons,  to
confirm  such  advice in  writing,  (A) when the  Prospectus  or any  Prospectus
supplement or post-effective  amendment has been filed, and, with respect to any
Registration  Statement or any post-effective  amendment thereto,  when the same
has become effective, (B) of any request by the Commission for amendments to the
Registration  Statement or amendments or  supplements  to the  Prospectus or for
additional  information  relating thereto, (C) of the issuance by the Commission
of any stop order suspending the  effectiveness  of the  Registration  Statement
under the Securities Act or of the suspension by any state securities commission
of the qualification of the Transfer Restricted  Securities for offering or sale
in  any  jurisdiction,  or  the  initiation  of any  proceeding  for  any of the
preceding  purposes,  (D) of the  existence of any fact or the  happening of any
event  that makes any  statement  of a  material  fact made in the  Registration
Statement, the Prospectus,  any amendment or supplement thereto, or any document
incorporated  by reference  therein  untrue,  or that requires the making of any
additions to or changes in the Registration Statement or the Prospectus in order
to make the  statements  therein not  misleading.  If at any time the Commission
shall issue any stop order  suspending  the  effectiveness  of the  Registration
Statement,  or any state  securities  commission or other  regulatory  authority
shall  issue  an  order   suspending   the   qualification   or  exemption  from
qualification  of the Transfer  Restricted  Securities under state securities or
Blue Sky laws, the Company shall use its  reasonable  best efforts to obtain the
withdrawal or lifting of such order at the earliest possible time.

(iv) Furnish to each of the selling holders and each of the  underwriter(s),  if
any, before filing with the Commission,  copies of any Registration Statement or
any  Prospectus  included  therein or any  amendments or supplements to any such
Registration  Statement or Prospectus  (including,  upon request in writing, all
documents   incorporated   by  reference   after  the  initial  filing  of  such
Registration  Statement),  which documents will be subject to the review of such
holders and  underwriter(s),  if any,  for a period of at least  three  Business
Days,  and the  Company  will  not  file  any  such  Registration  Statement  or
Prospectus or any amendment or supplement to any such Registration  Statement or
Prospectus  (including all such documents  incorporated by reference) to which a
selling holder of Transfer  Restricted  Securities  covered by such Registration
Statement or the  underwriter(s),  if any, shall reasonably  object within three
Business Days after the receipt  thereof.  A selling holder or  underwriter,  if
any,  shall  be  deemed  to have  reasonably  objected  to such  filing  if such
Registration Statement,  amendment,  Prospectus or supplement, as applicable, as
proposed to be filed, contains a material misstatement or omission.

(v) Promptly  before the filing of any document  that is to be  incorporated  by
reference into a Registration  Statement or Prospectus  after the initial filing
of such  Registration  Statement,  (A)  provide  copies of such  document to the
selling  Holders  and to the  underwriter(s),  if any,  (B) make  the  Company's
representatives  available for  discussion of such document and other  customary
due diligence matters,  and (C) include such information in such document before
the filing thereof as such selling Holders or underwriter(s), if any, reasonably
may request.

(vi) Make available at reasonable  times for inspection by the selling  Holders,
any underwriter  participating in any distribution pursuant to such Registration
Statement,  and any attorney or accountant  retained by such selling  Holders or
any of the underwriter(s),  all financial and other records, pertinent corporate
documents  and  properties  of the  Company  and cause the  Company's  officers,
directors, managers and employees to supply all information reasonably requested
by any such Holder, underwriter,  attorney or accountant in connection with such
Registration Statement after the filing thereof and before its effectiveness.

(vii)  If  requested  by any  selling  Holders  or the  underwriter(s),  if any,
promptly incorporate in any Registration Statement or Prospectus,  pursuant to a
supplement or  post-effective  amendment if necessary,  such information as such
selling  Holders and  underwriter(s),  if any,  may  reasonably  request to have
included therein,  including,  without limitation,  information  relating to the
"Plan of Distribution" of the Transfer Restricted  Securities,  information with
respect to the principal amount of Transfer Restricted  Securities being sold to
such underwriter(s),  the purchase price being paid therefor and any other terms
of the  offering  of the  Transfer  Restricted  Securities  to be  sold  in such
offering;  and  make all  required  filings  of such  Prospectus  supplement  or
post-effective amendment as soon as practicable after the Company is notified of
the matters to be incorporated in such Prospectus  supplement or  post-effective
amendment.

(viii)  Furnish to each selling Holder and each of the  underwriter(s),  if any,
without charge, at least one copy of the Registration  Statement, as first filed
with the Commission,  and of each amendment thereto,  including, if requested in
writing,  all documents  incorporated by reference  therein and, if requested in
writing, all exhibits (including exhibits incorporated therein by reference).

(ix)  Deliver to each  selling  Holder and each of the  underwriter(s),  if any,
without charge,  as many copies of the Prospectus  (including  each  preliminary
prospectus) and any amendment or supplement  thereto as such Persons  reasonably
may request;  the Company  hereby  consents to the use of the Prospectus and any
amendment or supplement  thereto by each of the selling  Holders and each of the
underwriter(s),  if any, in  connection  with the  offering  and the sale of the
Transfer  Restricted  Securities  covered by the  Prospectus or any amendment or
supplement thereto.

(x) Whether or not an underwriting  agreement is entered into and whether or not
the  registration is an Underwritten  Registration,  the Company shall: (A) upon
request,  furnish to each selling Holder and each  underwriter,  if any, in such
substance and scope as they may reasonably  request and as are customarily  made
by issuers to underwriters in primary underwritten  offerings,  upon the date of
effectiveness of the Shelf Registration Statement: (1) a certificate,  dated the
date of effectiveness  of the Shelf  Registration  Statement,  signed by (y) the
President and (z) the Chief Financial Officer of the Company  confirming,  as of
the date thereof,  the matters set forth in Section 1 of the Purchase  Agreement
and such other matters as such parties may reasonably  request;  (2) an opinion,
dated the date of effectiveness of the Shelf Registration  Statement, of counsel
for the Company  covering  the matters set forth in Section 7(c) of the Purchase
Agreement;  and  (3)  customary  comfort  letters,  dated  as  of  the  date  of
effectiveness of the Shelf Registration Statement from the Company's independent
accountants,  in the customary form and covering matters of the type customarily
covered  in  comfort   letters  by   underwriters  in  connection  with  primary
underwritten offerings; (B) set forth in full or incorporate by reference in the
underwriting agreement, if any, the indemnification provisions and procedures of
Section 6 hereof with respect to all parties to be indemnified  pursuant to said
Section;  and (C)  deliver  such  other  documents  and  certificates  as may be
reasonably  requested  by such  parties to evidence  compliance  with clause (A)
above and with any customary conditions contained in the underwriting  agreement
or other agreement  entered into by the selling Holders  pursuant to this clause
(x).

(xi) Before any public  offering of Transfer  Restricted  Securities,  cooperate
with the selling  Holders,  the  underwriter(s),  if any,  and their  respective
counsel in connection with the  registration  and  qualification of the Transfer
Restricted   Securities   under  the   securities  or  Blue  Sky  laws  of  such
jurisdictions as the selling Holders or  underwriter(s),  if any, may reasonably
request and do any and all other acts or things necessary or advisable to enable
the  disposition in such  jurisdictions  of the Transfer  Restricted  Securities
covered by the Shelf Registration Statement; provided, however, that the Company
shall not be required to register or qualify as a foreign  corporation  where it
is not now so  qualified  or to take any  action  that  would  subject it to the
service of process, in any jurisdiction where it is not now so subject.

(xii)  Cooperate  with the selling  Holders and the  underwriter(s),  if any, to
facilitate  the timely  preparation  and delivery of  certificates  representing
Transfer  Restricted  Securities to be sold; and enable such Transfer Restricted
Securities  to be in such  denominations  and  registered  in such  names as the
Holders or the  underwriter(s),  if any, may request at least two Business  Days
before any sale of Transfer Restricted Securities made by such underwriter(s).

(xiii)  Use its  reasonable  best  efforts  to  cause  the  Transfer  Restricted
Securities  covered  by the  Registration  Statement  to be  registered  with or
approved  by such other U.S.  governmental  agencies  or  authorities  as may be
necessary to enable the seller or sellers thereof or the underwriter(s), if any,
to consummate the disposition of such Transfer Restricted Securities.

(xiv) Subject to Section  4(b)(i) above,  if any fact or event  contemplated  by
Section 4(b)(iii)(D) above shall exist or have occurred, prepare a supplement or
post-effective  amendment to the Registration Statement or related Prospectus or
any  document  incorporated  therein  by  reference  or file any other  required
document  so  that,  as  thereafter  delivered  to the  purchasers  of  Transfer
Restricted Securities,  the Prospectus will not contain an untrue statement of a
material  fact or  omit  to  state  any  material  fact  necessary  to make  the
statements therein not misleading.

(xv)  Cooperate and assist in any filings  required to be made with the NASD and
in the performance of any due diligence investigation by any underwriter that is
required to be  retained in  accordance  with the rules and  regulations  of the
NASD.

(xvi)  Otherwise use its  reasonable  best efforts to comply with all applicable
rules and  regulations of the  Commission,  and make generally  available to its
security  holders,  as soon as practicable,  a consolidated  earnings  statement
meeting  the  requirements  of Rule  158  (which  need not be  audited)  for the
twelve-month  period (A)  commencing  at the end of any fiscal  quarter in which
Transfer  Restricted  Securities  are  sold  to  underwriters  in a firm or best
efforts  Underwritten  Offering  or (B) if not sold to  underwriters  in such an
offering,  beginning with the first month of the Company's  first fiscal quarter
commencing after the effective date of the Registration Statement.

(xvii)  Cause the  Indenture  to be  qualified  under the TIA not later than the
effective date of the first  Registration  Statement required by this Agreement,
and,  in  connection  therewith,  cooperate  with the trustee and the holders of
Notes to effect  such  changes  to the  Indenture  as may be  required  for such
Indenture  to be so  qualified  in  accordance  with the  terms of the TIA;  and
execute and use its reasonable  best efforts to cause the trustee  thereunder to
execute all documents  that may be required to effect such changes and all other
forms and  documents  required  to be filed with the  Commission  to enable such
Indenture to be so qualified in a timely manner.

(xviii) Cause all Transfer  Restricted  Securities  covered by the  Registration
Statement to be listed on each securities  exchange on which similar  securities
issued by the Company are then listed.

(xix) Provide  promptly to each Holder upon written  request each document filed
with the Commission pursuant to the requirements of Section 13 and Section 15 of
the Exchange Act after the Effective Date of the Registration Statement.

(c) Each Holder agrees by  acquisition of a Transfer  Restricted  Security that,
upon receipt of any notice from the Company of the  existence of any fact of the
kind  described  in Section  4(b)(iii)(D)  hereof,  such Holder  will  forthwith
discontinue  disposition  of  Transfer  Restricted  Securities  pursuant  to the
applicable  Registration  Statement until such Holder's receipt of the copies of
the supplemented or amended Prospectus contemplated by Section 4(b)(xiv) hereof,
or until it is advised in writing (the  "Advice") by the Company that the use of
the  Prospectus  may be resumed,  and has received  copies of any  additional or
supplemental filings that are incorporated by reference in the Prospectus. If so
directed  by the  Company,  each  Holder  will  deliver to the  Company  (at the
Company's  expense) all copies,  other than  permanent  file copies then in such
Holder's  possession,  of  the  Prospectus  covering  such  Transfer  Restricted
Securities that was current at the time of receipt of such notice.

5. Registration Expenses.

(a) All expenses  incident to the Company's  performance  of or compliance  with
this Agreement will be borne by the Company regardless of whether a Registration
Statement becomes effective,  including without limitation: (i) all registration
and filing fees and expenses  (including  filings made by any Initial Purchasers
or Holders  with the NASD (and,  if  applicable,  the fees and  expenses  of any
"qualified independent  underwriter" and its counsel that may be required by the
rules and  regulations  of the NASD));  (ii) all fees and expenses of compliance
with  federal  securities  and  state  Blue Sky or  securities  laws;  (iii) all
expenses  of  printing  (including  printing  of  Prospectuses),  messenger  and
delivery services and telephone;  (iv) all fees and disbursements of counsel for
the  Company  and,  subject to  Section  5(b)  below,  the  Holders of  Transfer
Restricted  Securities;  (v) all  application and filing fees in connection with
listing of the Common  Stock issued upon  conversion  of the Notes on a national
securities  exchange or automated  quotation system pursuant to the requirements
hereof;  and (vi) all fees and  disbursements  of independent  certified  public
accountants  of the Company  (including  the  expenses of any special  audit and
comfort letters required by or incident to such  performance),  but specifically
excluding (a) fees and expenses of counsel to the underwriter(s),  if any (other
than  fees  and  expenses  set  forth  in  clauses  (i)  and  (ii)  above),  (b)
underwriting  discounts and  commissions and (c) transfer fees and taxes if any,
relating to the sale and  disposition  of Transfer  Restricted  Securities  by a
selling  Holder.  The Company  will,  in any event,  bear its internal  expenses
(including,  without  limitation,  all salaries and expenses of its officers and
employees  performing  legal or accounting  duties),  the expenses of any annual
audit  and the fees and  expenses  of any  Person,  including  special  experts,
retained by the Company.

(b) In connection with any  Registration  Statement  required by this Agreement,
the Company will  reimburse the Initial  Purchasers  and the Holders of Transfer
Restricted  Securities  being  registered  pursuant  to the  Shelf  Registration
Statement, as applicable,  for the reasonable fees and disbursements of not more
than one  counsel  chosen by the Holders of a majority  in  principal  amount of
Debentures  and in  number of shares of  Common  Stock  issued  upon  conversion
thereof for whose benefit such Registration Statement is being prepared.

6. Indemnification and Contribution.

(a) The Company  agrees to indemnify and hold  harmless:  (i) each Holder;  (ii)
each  person,  if any,  who  controls  (within  the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) any Holder (any of the persons
referred to in this clause (ii) being  referred to as a  "controlling  person");
and   (iii)   the   respective   officers,   directors,   partners,   employees,
representatives  and agents of any Holder or any controlling  person (any person
referred to in clause (i),  (ii), or (iii)  hereinafter  being referred to as an
"Indemnified Holder"), against any losses, claims, damages or liabilities, joint
or  several,  to which such  Indemnified  Holder may  become  subject  under the
Securities  Act,  the  Exchange  Act or  otherwise,  insofar as any such losses,
claims,  damages or liabilities (or actions in respect  thereof) arise out of or
are based upon:  (i) any untrue  statement  or alleged  untrue  statement of any
material fact contained in (A) any  Registration  Statement or Prospectus or any
amendment or supplement thereto or (B) any application or other document, or any
amendment or supplement  thereto,  executed by the Company or based upon written
information  furnished by or on behalf of the Company filed in any  jurisdiction
in order to qualify the Notes and the Common Stock issued upon conversion of the
Notes under the state securities or "Blue Sky" laws or filed with the Commission
or any securities association or securities exchange (each an "Application"); or
(ii) the omission or alleged omission to state, in such  Registration  Statement
or Prospectus or any amendment or supplement thereto,  or in any Application,  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,  and will reimburse,  as incurred,  each Indemnified  Holder for any
legal or other  expenses  reasonably  incurred  by such  Indemnified  Holder  or
controlling  person in  connection  with  investigating,  defending  against  or
appearing as a  third-party  witness in  connection  with any such loss,  claim,
damage, liability or action;  provided,  however, the Company will not be liable
in any such case to the extent that any such loss,  claim,  damage, or liability
is  finally  judicially  determined  to arise out of or be based upon any untrue
statement or alleged  untrue  statement or omission or alleged  omission made in
such Registration  Statement or Prospectus or amendment or supplement thereto or
Application  in  reliance  upon  and  in  conformity  with  written  information
furnished  to the Company  through the Holders by or on behalf of any Holder (or
its related  Indemnified  Holder)  specifically for use therein.  This indemnity
agreement  will be in addition to any  liability  that the Company may otherwise
have to the  Indemnified  Holders.  The Company  shall not be liable  under this
Section  6 for any  settlement  of any  claim or  action  effected  without  its
consent, which shall not be unreasonably withheld.

(b) Each Holder,  severally  and not jointly,  will  indemnify and hold harmless
each of the Company and each person, if any, who controls the Company within the
meaning of Section 15 of the  Securities  Act or Section 20 of the  Exchange Act
against any losses,  claims,  damages or liabilities to which the Company or any
such  controlling  person may  become  subject  under the  Securities  Act,  the
Exchange  Act,  or  otherwise,  insofar  as  such  losses,  claims,  damages  or
liabilities  (or actions in respect  thereof) arise out of or are based upon (i)
any untrue  statement or alleged untrue statement of any material fact contained
in the  Registration  Statement or the Prospectus or any amendment or supplement
thereto or any Application or (ii) the omission or the alleged omission to state
therein a material fact required to be stated therein,  or necessary to make the
statements  therein not misleading,  in each case to the extent, but only to the
extent,  that such untrue  statement or alleged untrue  statement or omission or
alleged  omission  was made in  reliance  upon and in  conformity  with  written
information  furnished to the Company through the Holders by or on behalf of any
Holder or its related  Indemnified  Holder  specifically  for use therein;  and,
subject to the limitation  set forth  immediately  preceding  this clause,  will
reimburse,  as incurred,  any legal or other expenses incurred by the Company or
any controlling  person in connection with investigating or defending against or
appearing  as a third party  witness in  connection  with any such loss,  claim,
damage, liability or action in respect thereof. This indemnity agreement will be
in  addition  to any  liability  that  any  Holder  may  otherwise  have  to the
indemnified  parties.  No Holder  shall be liable  under this  Section 6 for any
settlement of any claim or action effected without its consent,  which shall not
be unreasonably  withheld. In no event shall the liability of any selling Holder
hereunder be greater in amount than the dollar  amount of the proceeds  received
by such Holder upon the sale of Transfer  Restricted  Securities  giving rise to
such indemnification obligation.

(c)  Promptly  after  receipt by an  indemnified  party under this  Section 6 of
notice of the  commencement  of any action for which such  indemnified  party is
entitled to  indemnification  under this Section 6, such indemnified party will,
if a claim in respect thereof is to be made against the indemnifying party under
this Section 6, notify the indemnifying party of the commencement  thereof;  but
the  omission so to notify the  indemnifying  party (i) will not relieve it from
any liability  under  paragraph (a) or (b) above unless and to the extent it did
not otherwise learn of such action and such failure results in the forfeiture by
the indemnifying  party of substantial rights and defenses and (ii) will not, in
any  event,   relieve  the  indemnifying  party  from  any  obligations  to  any
indemnified  party  other  than  the  indemnification   obligation  provided  in
paragraphs  (a) and (b) above.  In case any such  action is brought  against any
indemnified  party, and it notifies the  indemnifying  party of the commencement
thereof,  the indemnifying party will be entitled to participate therein and, to
the extent that it may wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel reasonably satisfactory to
such indemnified party; provided, however, that if (i) the use of counsel chosen
by the indemnifying  party to represent the indemnified party would present such
counsel  with a conflict of  interest,  (ii) the  defendants  in any such action
include  both  the  indemnified  party  and  the  indemnifying   party  and  the
indemnified  party shall have been  advised by counsel  that there may be one or
more legal  defenses  available  to it and other  indemnified  parties  that are
different  from or additional to those  available to the  indemnifying  party or
(iii)  the  indemnifying  party  shall  not  have  employed  counsel  reasonably
satisfactory to the indemnified  party to represent the indemnified party within
a reasonable time after notice of the institution of such action,  then, in each
such case, the indemnifying party shall not have the right to direct the defense
of such  action  on  behalf  of such  indemnified  party  or  parties  and  such
indemnified  party or parties shall have the right to select separate counsel to
defend such action on behalf of such indemnified party or parties.  After notice
from the  indemnifying  party to such  indemnified  party of its  election so to
assume the defense  thereof and  approval by such  indemnified  party of counsel
appointed to defend such action,  the  indemnifying  party will not be liable to
such  indemnified  party under this  Section 6 for any legal or other  expenses,
other than  reasonable  costs of  investigation,  subsequently  incurred by such
indemnified  party  in  connection  with the  defense  thereof,  unless  (i) the
indemnified  party shall have employed  separate  counsel in accordance with the
proviso to the immediately  preceding  sentence (it being  understood,  however,
that in connection with such action the  indemnifying  party shall not be liable
for the  expenses  of more  than one  separate  counsel  (in  addition  to local
counsel) in any one action or separate but substantially  similar actions in the
same jurisdiction  arising out of the same general allegations or circumstances,
designated by the Holders in the case of paragraph (a) of this  Section 6 or the
Company  in the  case of  paragraph  (b) of this  Section  6,  representing  the
indemnified  parties under such  paragraph (a) or paragraph (b), as the case may
be, who are parties to such action or  actions) or (ii) the  indemnifying  party
has authorized in writing the employment of counsel for the indemnified party at
the expense of the indemnifying  party.  After such notice from the indemnifying
party to such indemnified  party, the indemnifying  party will not be liable for
the costs  and  expenses  of any  settlement  of such  action  effected  by such
indemnified  party without the consent of the  indemnifying  party,  unless such
indemnified  party  waived in writing its rights  under this Section 6, in which
case the indemnified party may effect such a settlement without such consent.

(d) In  circumstances  in which  the  indemnity  agreement  provided  for in the
preceding  paragraphs of this Section 6 is unavailable or  insufficient  to hold
harmless  an  indemnified  party in respect of any  losses,  claims,  damages or
liabilities (or actions in respect thereof),  each indemnifying  party, in order
to provide for just and equitable  contribution,  shall contribute to the amount
paid or payable by such  indemnified  party as a result of such losses,  claims,
damages or liabilities (or actions in respect  thereof) in such proportion as is
appropriate to reflect (i) the relative  benefits received by the Company on the
one hand and any  Holder  on the  other  from  such  Holder's  sale of  Transfer
Restricted Securities or (ii) if the allocation provided by the foregoing clause
(i) is not permitted by applicable law, not only such relative benefits but also
the  relative  fault of the Company on the one hand and such Holder on the other
in  connection  with the  statements  or  omissions  or  alleged  statements  or
omissions  that  resulted in such losses,  claims,  damages or  liabilities  (or
actions  in  respect  thereof).  The  relative  fault  of the  parties  shall be
determined by reference  to, among other  things,  whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to  information  supplied by the Company on the one hand
or such Holder on the other, the parties' relative intent, knowledge,  access to
information  and  opportunity  to correct or prevent such statement or omission,
and any other equitable  considerations  appropriate in the  circumstances.  The
Company and each Holder of Transfer  Restricted  Securities  agree that it would
not be equitable if the amount of such  contribution were determined by pro rata
or per capita allocation or by any other method of allocation that does not take
into account the equitable  considerations  referred to in the first sentence of
this paragraph (d). Notwithstanding the provisions of this Section 6(d), none of
the Holders (or any of their related  Indemnified  Holders) shall be required to
contribute any amount in excess of the amount by which proceeds received by such
Holder from an offering of Transfer Restricted  Securities exceeds the amount of
any damages  which such  Holder has  otherwise  paid or become  liable to pay by
reason of any  untrue  or  alleged  untrue  statement  or  omission  or  alleged
omission. No person guilty of fraudulent  misrepresentation  (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to  contribution  from
any person who was not guilty of such fraudulent misrepresentation. For purposes
of this paragraph  (d), each person,  if any, who controls any Holder within the
meaning of Section 15 of the  Securities  Act or Section 20 of the  Exchange Act
shall have the same rights to contribution as such Holder,  and each person,  if
any, who controls the Company within the meaning of Section 15 of the Securities
Act  or  Section  20 of  the  Exchange  Act,  shall  have  the  same  rights  to
contribution as the Company.
 
7. Rule 144A.  The Company  hereby  agrees with each Holder,  for so long as any
Transfer  Restricted  Securities  remain  outstanding,  to make available to any
Holder or beneficial owner of Transfer Restricted  Securities in connection with
any sale  thereof and any  prospective  purchaser  of such  Transfer  Restricted
Securities from such Holder or beneficial  owner,  the  information  required by
Rule  144A(d)(4)  under the  Securities  Act in order to permit  resales of such
Transfer Restricted Securities pursuant to Rule 144A.

8. Participation in Underwritten Registrations. No Holder may participate in any
Underwritten  Registration  hereunder unless such Holder (a) agrees to sell such
Holder's   Transfer   Restricted   Securities  on  the  basis  provided  in  any
underwriting  arrangements approved by the Persons entitled hereunder to approve
such arrangements and (b) completes and executes all reasonable  questionnaires,
powers of attorney,  indemnities,  underwriting  agreements,  lockup letters and
other documents required under the terms of such underwriting arrangements.

9.  Selection of  Underwriters.  The Holders of Transfer  Restricted  Securities
covered by the Shelf  Registration  Statement  who desire to do so may sell such
Transfer  Restricted  Securities  in  an  Underwritten  Offering.  In  any  such
Underwritten  Offering,  the investment banker or investment bankers and manager
or managers that will administer the offering will be selected by the Holders of
a  majority  in number of shares of  Common  Stock  included  in such  offering;
provided,   that  such  investment  bankers  and  managers  must  be  reasonably
satisfactory to the Company.

10. Miscellaneous.

(a) Remedies. The Company agrees that monetary damages (including the Liquidated
Damages  contemplated  hereby) would not be adequate  compensation  for any loss
incurred by reason of a breach by it of the provisions of this  Agreement  other
than with respect to Registration Defaults and hereby agree to waive the defense
in any action for specific performance that a remedy at law would be adequate.

(b) No  Inconsistent  Agreements.  The Company will not, on or after the date of
this Agreement,  enter into any agreement with respect to its securities that is
inconsistent  with the  rights  granted  to the  Holders  in this  Agreement  or
otherwise  conflicts with the provisions  hereof. The Company has not previously
entered  into any  agreement  granting any  registration  rights with respect to
their securities to any Person which rights conflict with the provisions hereof.
The rights granted to the Holders  hereunder do not in any way conflict with and
are not  inconsistent  with the rights  granted to the holders of the  Company's
securities under any agreement in effect on the date hereof.

(c)  Amendments  and Waivers.  This  Agreement  may not be amended,  modified or
supplemented,  and  waivers or  consents to or  departures  from the  provisions
hereof may not be given,  unless the Company has obtained the written consent of
Holders of a majority in number of shares of Common Stock issued upon conversion
of the Debentures, as the case may be.

(d)  Notices.  All notices and other  communications  provided  for or permitted
hereunder  shall  be  made  in  writing  by   hand-delivery,   first-class  mail
(registered or certified,  return receipt requested),  telex, telecopier, or air
courier guaranteeing overnight delivery:

(i) if to a Holder,  at the address  set forth on the  records of the  Registrar
under the Indenture or the transfer  agent of the Common Stock,  as the case may
be; and

(ii) if to the Company:

                           Key Energy Group, Inc.
                           255 Livingston Avenue
                           New Brunswick, New Jersey 08901
                           Attention:  Jack D. Loftis, Jr.

                           With a copy to:

                           Porter & Hedges, L.L.P.
                           700 Louisiana
                           Houston, Texas 77002
                           Attention:  Samuel N. Allen

All such notices and communications  shall be deemed to have been duly given: at
the time  delivered by hand, if personally  delivered,  five Business Days after
being deposited in the mail, postage prepaid,  if mailed; when answered back, if
telexed; when receipt acknowledged, if telecopied; and on the next Business Day,
if timely delivered to an air courier guaranteeing overnight delivery.

(e) Successors and Assigns.  This Agreement shall inure to the benefit of and be
binding  upon the  successors  and  assigns  of each of the  parties,  including
without  limitation and without the need for an express  assignment,  subsequent
Holders  of  Transfer  Restricted  Securities;   provided,  however,  that  this
Agreement  shall not inure to the benefit of or be binding  upon a successor  or
assign of a Holder  unless and to the extent such  successor or assign  acquired
Transfer Restricted Securities from such Holder.

(f)  Counterparts.  This Agreement may be executed in any number of counterparts
and by the  parties  hereto  in  separate  counterparts,  each of which  when so
executed shall be deemed to be an original and all of which taken together shall
constitute one and the same agreement.

(g) Headings.  The headings in this  Agreement are for  convenience of reference
only and shall not limit or otherwise affect the meaning hereof.

(h)  Governing  Law.  THIS  AGREEMENT  SHALL BE  GOVERNED  BY AND  CONSTRUED  IN
ACCORDANCE  WITH  THE LAWS OF THE  STATE  OF NEW  YORK,  WITHOUT  REGARD  TO THE
CONFLICT OF LAW RULES THEREOF.

(i) Severability.  If any one or more of the provisions contained herein, or the
application   thereof  in  any  circumstance,   is  held  invalid,   illegal  or
unenforceable,  the validity,  legality and enforceability of any such provision
in every other respect and of the remaining  provisions  contained  herein shall
not be affected or impaired thereby.

(j) Entire  Agreement.  This  Agreement  is  intended  by the parties as a final
expression  of their  agreement  and  intended  to be a complete  and  exclusive
statement of the agreement and understanding of the parties hereto in respect of
the  subject  matter  contained  herein.  There are no  restrictions,  promises,
warranties  or  undertakings,  other than those set forth or  referred to herein
with respect to the  registration  rights granted by the Company with respect to
the  Transfer  Restricted  Securities.   This  Agreement  supersedes  all  prior
agreements and  understandings  between the parties with respect to such subject
matter.

                            [SIGNATURE PAGE FOLLOWS]



IN WITNESS  WHEREOF,  the parties have  executed  this  Agreement as of the date
first written above.

KEY ENERGY GROUP, INC.


By:                                               


LEHMAN BROTHERS INC.


By:                                                


MCMAHAN SECURITIES CO. L.P.


By: