STOCK OPTION AGREEMENT


      This  STOCK  OPTION  AGREEMENT,  dated  as  of  September  9,  1999  (this
"Agreement"),  is between PREMARK  INTERNATIONAL,  INC., a Delaware  corporation
("Issuer"), and ILLINOIS TOOLWORKS INC., a Delaware corporation ("Grantee").


                                    RECITALS

      A.  The Merger  Agreement.  Prior to the entry into this Agreement and
prior to the grant of the Option (as defined in Section 1(a)), Issuer,  Grantee,
and CS Merger Sub Inc., a wholly owned subsidiary of Grantee ("Merger Sub") have
entered  into an  Agreement  and  Plan of  Merger,  dated as of the date of this
Agreement (the "Merger Agreement"),  pursuant to which Grantee and Issuer intend
to effect a merger of Merger Sub with and into Issuer (the "Merger").

      B.  The Stock Option  Agreement.  As an  inducement  and  condition to
Grantee's and Merger Sub's willingness to enter into the Merger  Agreement,  and
in  consideration  thereof,  the board of  directors  of Issuer has approved the
grant to Grantee of the Option pursuant to this Agreement and the acquisition of
Common Stock (as defined below) by Grantee pursuant to this Agreement; provided,
that such grant was  expressly  conditioned  upon,  and made of no effect  until
after,  execution  and delivery by Issuer,  Grantee and Merger Sub of the Merger
Agreement.

      NOW, THEREFORE,  in consideration of the premises and the mutual covenants
and  agreements  set forth in this  Agreement and in the Merger  Agreement,  the
parties agree as follows:

      1.  The Option.  (a) Issuer  hereby  grants to Grantee an  irrevocable
option (the  "Option") to purchase,  subject to the terms and conditions of this
Agreement, up to 12,203,694 fully paid and nonassessable shares of common stock,
$1.00 par value per share  ("Common  Stock"),  of Issuer at a price per share in
cash equal to $34.06 (the "Option Price");  provided,  however, that in no event
shall the number of shares for which the Option is  exercisable  exceed 19.9% of
the  shares of Common  Stock  issued  and  outstanding  at the time of  exercise
(without  giving  effect to the shares of Common Stock issued or issuable  under
the  Option)  (the  "Maximum  Applicable  Percentage").  The number of shares of
Common Stock  purchasable  upon  exercise of the Option and the Option Price are
subject to adjustment as set forth in this Agreement.

      (b) In the event that any additional  shares of Common Stock are issued or
otherwise  become  outstanding  after  the date of this  Agreement  (other  than
pursuant to this  Agreement),  the






aggregate number of shares of Common Stock purchasable upon exercise of the
Option (inclusive of shares, if any, previously purchased upon exercise of the
Option) shall automatically be increased (without any further action on the part
of Issuer or Grantee being necessary) so that, after such issuance, it equals
the Maximum Applicable Percentage. Any such increase shall not affect the Option
Price.

      2. Exercise;  Closing.  (a)  Conditions  to  Exercise;  Termination.
Grantee  (sometimes  referred to as the  "Holder")  may exercise the Option,  in
whole or in part, by delivering a written  notice thereof as provided in Section
2(d) within 135 days following the occurrence of a Triggering  Event (as defined
in Section 2(b)) unless prior to such  Triggering  Event the Effective  Time (as
defined in the Merger  Agreement)  shall have  occurred or the Option shall have
terminated in accordance with the following  sentence.  If no notice pursuant to
the  preceding  sentence  has been  delivered  prior  thereto,  the Option shall
terminate upon either (i) the occurrence of the Effective Time or (ii) the close
of business  on the earlier of (x) the day 135 days after the date that  Grantee
becomes  entitled  to  receive  the  Termination  Fee (as  defined in the Merger
Agreement)  under Section  8.5(b) of the Merger  Agreement and (y) the date that
Grantee is no longer  potentially  entitled to receive the Termination Fee under
Section 8.5(b) of the Merger  Agreement for a reason other than that Grantee has
already received the Termination Fee.

      (b)  Triggering  Event.  A  "Triggering  Event" shall have occurred if the
Merger Agreement is terminated and Grantee shall have become entitled to receive
the Termination Fee pursuant to Section 8.5(b) of the Merger Agreement.

      (c) Notice of Triggering Event by Issuer. Issuer shall notify Grantee
promptly in writing of the occurrence of any Triggering Event, it being
understood that the giving of such notice by Issuer shall not be a condition to
the right of the Holder to exercise the Option.

      (d) Notice of Exercise by Grantee.  If the Holder shall be entitled to and
wishes to  exercise  the Option,  it shall send to Issuer a written  notice (the
date of which is referred to in this Agreement as the "Notice Date")  specifying
(i) the total  number of shares that the Holder will  purchase  pursuant to such
exercise  and (ii) a place and date (a "Closing  Date") not  earlier  than three
business  days nor later  than 20  business  days from the  Notice  Date for the
closing of such purchase (a "Closing");  provided, that if the Closing cannot be
effected by reason of the application of any laws, (x) the Holder or Issuer,  as
required,  promptly  after the giving of such  notice  shall  file the  required
notice,  report,  filing or  application  for approval  and shall  expeditiously
process  the same and (y) the  Closing  Date shall be extended to not later than
the  tenth   business  day  following  the  expiration  or  termination  of  the
restriction imposed by such law. Each of the Holder and the Issuer agrees to use
its reasonable best efforts to cooperate with and provide  information to Issuer
or Holder,  as the case may be, for the purpose of any required notice,  report,
filing or application for approval.



                                       2



      (e) Payment of Purchase  Price.  At each Closing,  the Holder shall pay to
Issuer the  aggregate  purchase  price for the shares of Common Stock  purchased
pursuant to the exercise of the Option in immediately  available funds by a wire
transfer to a bank  account  designated  by Issuer;  provided,  that  failure or
refusal of Issuer to designate such a bank account shall not preclude the Holder
from exercising the Option, in whole or in part.

      (f) Delivery of Common  Stock.  At such Closing,  simultaneously  with the
payment of the purchase price by the Holder,  Issuer shall deliver to the Holder
a certificate or certificates  representing the number of shares of Common Stock
purchased  by the Holder and, if the Option  shall be  exercised in part only, a
new Option  evidencing  the rights of the Holder to  purchase  the  balance  (as
adjusted  pursuant  to  Section  1(b))  of  the  shares  of  Common  Stock  then
purchasable under this Agreement and the Holder shall deliver to the Company its
written agreement that the Holder will not offer to sell or otherwise dispose of
such shares of Common Stock in violation of law or this Agreement.

      (g)  Restrictive  Legend.  Certificates  for Common  Stock  delivered at a
Closing  shall  be  endorsed   with  a   restrictive   legend  that  shall  read
substantially as follows:

            "The  transfer  of the shares  represented  by this  certificate  is
      subject to resale  restrictions  arising under the Securities Act of 1933,
      as amended, and pursuant to the terms of a Stock Option Agreement dated as
      of  September 9, 1999.  A copy of such  agreement  will be provided to the
      holder  hereof  without  charge  upon  receipt by the Company of a written
      request therefor."

It is understood  and agreed that the above legend shall be removed,  insofar as
it  refers  to  the   Securities   Act  of  1933,   by  delivery  of  substitute
certificate(s)  without  such  reference  to the  Securities  Act of 1933 if the
Holder  shall have  delivered to Issuer a copy of a letter from the staff of the
Securities and Exchange Commission, or a written opinion of counsel, in form and
substance  reasonably  satisfactory to Issuer, to the effect that such reference
is not  required  for purposes of the  Securities  Act of 1933,  as amended (the
"Securities Act"). In addition, such certificates shall bear any other legend as
may be required by applicable law.

      3. Covenants  of Issuer.  In  addition to its other  agreements  and
covenants in this Agreement, Issuer agrees:

            (a)  Shares  Reserved  for  Issuance.  It will  maintain,  free from
      preemptive rights,  sufficient  authorized but unissued or treasury shares
      of Common Stock to issue the appropriate  number of shares of Common Stock
      pursuant  to the terms of this  Agreement  so that the Option may be fully
      exercised  without  additional  authorization of Common Stock after giving
      effect to all other options,  warrants,  convertible  securities and other
      rights of third parties to purchase shares of Common Stock from Issuer.



                                       3



            (b) No Avoidance. It will not avoid or seek to avoid (whether by
      charter amendment or through reorganization, consolidation, merger,
      issuance of rights, dissolution or sale of assets, or by any other
      voluntary act) the observance or performance of any of the covenants,
      agreements or conditions to be observed or performed under this
      Agreement by Issuer.

            (c) Further  Assurances.  After the date of this Agreement,  it will
      promptly take all actions as may from time to time be required  (including
      (i) complying with all applicable  premerger  notification,  reporting and
      waiting  period   requirements  under  the   Hart-Scott-Rodino   Antitrust
      Improvements  Act of 1976,  as  amended  and (ii) in the event  that prior
      notice, report, filing or approval with respect to any Governmental Entity
      is necessary under any applicable foreign or United States federal,  state
      or local law before the Option may be  exercised,  cooperating  fully with
      the Holder in  preparing  and  processing  the  required  applications  or
      notices)  in order to  permit  each  Holder to  exercise  the  Option  and
      purchase  shares of Common Stock pursuant to such exercise  subject to the
      terms and conditions hereof.

            (d) Stock Exchange Listing.  It will use its reasonable best efforts
      to cause the shares of Common Stock to be issued pursuant to the Option to
      be approved for listing (to the extent they are not already listed) on the
      New York Stock  Exchange  ("NYSE"),  if the Common Stock is then listed on
      the NYSE, and on all other stock exchanges on which shares of Common Stock
      of the Issuer are then listed, subject to official notice of issuance.

      4. Representations and Warranties of Issuer.  Issuer represents and
warrants to Grantee as follows:

            (a)   Merger   Agreement.   Issuer   hereby   makes   each   of  the
      representations and warranties contained in Section 5.1(a), (b), (c), (d),
      (j) and (s) of the Merger  Agreement  to the extent  they relate to Issuer
      and this  Agreement,  as if such  representations  were set  forth in this
      Agreement.

            (b) Shares  Reserved for Issuance;  Capital Stock.  Issuer has taken
      all  necessary  corporate  action  to  authorize  and  reserve,  free from
      preemptive  rights,  and  permit it to issue,  sufficient  authorized  but
      unissued  or  treasury  shares of Common  Stock so that the  Option may be
      fully exercised  without  additional  authorization  of Common Stock after
      giving effect to all other options,  warrants,  convertible securities and
      other  rights of third  parties to  purchase  shares of Common  Stock from
      Issuer, and all such shares, upon issuance pursuant to the Option, will be
      duly authorized, validly issued, fully paid and nonassessable, and will be
      delivered free and clear of all claims, liens, encumbrances,  and security
      interests  (other than those created by this Agreement) and not subject to
      any  preemptive  rights.



                                       4



     5. Representations and Warranties of Grantee. Grantee hereby makes each of
the representations and warranties contained in Section 5.2(a),(c) and (d) of
the Merger Agreement to the extent they relate to the Grantee and this
Agreement, as if such representations were set forth in this Agreement.

     6. Exchange; Replacement. This Agreement and the Option granted by this
Agreement are exchangeable, without expense, at the option of the Holder, upon
presentation and surrender of this Agreement at the principal office of Issuer,
for other Agreements providing for Options of different denominations entitling
the holder thereof to purchase in the aggregate the same number of shares of
Common Stock purchasable at such time under this Agreement, subject to
corresponding adjustments in the number of shares of Common Stock purchasable
upon exercise so that the aggregate number of such shares under all stock option
agreements issued in respect of this Agreement shall not exceed the Maximum
Applicable Percentage. Unless the context shall require otherwise, the terms
"Agreement" and "Option" as used in this Agreement include any stock option
agreements and related Options for which this Agreement (and the Option granted
by this Agreement) may be exchanged. Upon (i) receipt by Issuer of evidence
reasonably satisfactory to it of the loss, theft, destruction of this Agreement,
or mutilation of this Agreement, (ii) receipt by Issuer of reasonably
satisfactory indemnification in the case of loss, theft or destruction of this
Agreement and (iii) surrender and cancellation of this Agreement in the case of
mutilation, Issuer will execute and deliver a new Agreement of like tenor and
date.

     7. Adjustments. In addition to the adjustment to the total number of shares
of Common Stock purchasable upon exercise of the Option pursuant to Section
1(b), the total number of shares of Common Stock purchasable upon the exercise
of the Option and the Option Price shall be subject to adjustment from time to
time as follows:

            In the event of any change in the outstanding shares of Common Stock
      by  reason  of stock  dividends,  split-ups,  mergers,  recapitalizations,
      combinations,  subdivisions, conversions, exchanges of shares or the like,
      the type and number of shares of Common Stock purchasable upon exercise of
      the  Option,  and  the  Option  Price  therefor,  shall  be  appropriately
      adjusted,  and proper provision shall be made in the agreements  governing
      any such  transaction,  so that (i) any Holder shall receive upon exercise
      of the Option the number and class of shares,  other securities,  property
      or cash that such Holder  would have  received in respect of the shares of
      Common  Stock  purchasable  upon  exercise of the Option if the Option had
      been  exercised  and such  shares of Common  Stock had been issued to such
      Holder  immediately  prior to such event or the record date  therefor,  as
      applicable,  and (ii) in the event any  additional  shares of Common Stock
      are to be issued or otherwise  become  outstanding as a result of any such
      change (other than  pursuant to an exercise of the Option),  the number of
      shares of Common Stock  purchasable  upon  exercise of the Option shall be
      increased so that,  after such issuance and together with shares of Common
      Stock  previously  issued  pursuant  to the  exercise  of the  Option  (as


                                       5



      adjusted on account of any of the foregoing  changes in the Common Stock),
      the  number  of  shares  so  purchasable  equals  the  Maximum  Applicable
      Percentage of the number of shares of Common Stock issued and  outstanding
      immediately after the consummation of such change.

      8. Registration.  (a) Upon the  occurrence  of a  Triggering  Event,
Issuer  shall,  at the request of Grantee  delivered  in the  written  notice of
exercise of the Option  provided for in Section 2(d), as promptly as practicable
prepare,  file  and  keep  current  a shelf  registration  statement  under  the
Securities  Act covering any or all shares  issued and issuable  pursuant to the
Option and shall use its  reasonable  best  efforts  to cause such  registration
statement  to become and remain  effective  for such period not in excess of 180
days from the day such registration  statement first becomes effective as may be
reasonably  necessary to permit the sale or other  disposition  of any shares of
Common  Stock  issued  upon total or  partial  exercise  of the Option  ("Option
Shares")  in  accordance  with any plan of  disposition  requested  by  Grantee;
provided,  however,  that  Issuer  may  suspend  filing  of or  maintaining  the
effectiveness of a registration  statement relating to a registration request by
Grantee  under this  Section 8 for a period of time (not in excess of 60 days in
the aggregate) if in its judgment such filing of such registration  statement or
the maintenance of its  effectiveness  would require the disclosure of nonpublic
information  that Issuer has a good faith  business  purpose for  preserving  as
confidential.  Subject to the  foregoing,  Issuer will use its  reasonable  best
efforts to cause such  registration  statement  to become  effective  as soon as
practicable. In connection with any such registration,  Issuer and Grantee shall
provide  each  other with  representations,  warranties,  indemnities  and other
agreements customarily given in connection with such registrations. If requested
by Grantee in connection with such registration,  Issuer shall become a party to
any underwriting  agreement relating to the sale of such shares, but only to the
extent  of  obligating  Issuer  in  respect  of   representations,   warranties,
indemnities,  contribution and other  agreements  customarily made by issuers in
such underwriting agreements.

      (b) To the extent  consistent  with the other  provisions  hereof,  in the
event that Grantee so requests,  the closing of the sale or other disposition of
the Common Stock or other securities pursuant to a registration  statement filed
pursuant  to Section  8(a) shall  occur  substantially  simultaneously  with the
exercise of the Option.

      (c)   Notwithstanding   any  other  provision  hereof,   any  request  for
registration  shall permit the Issuer,  upon written notice given within 30 days
of the request for registration, to repurchase from the Grantee any shares as to
which the  Grantee  requests  registration  at a price  per  share  equal to the
average of the closing  price per share of Common  Stock on the NYSE as reported
in the Wall Street  Journal,  New York City edition,  on the twenty NYSE trading
days ending on the second  business  day prior to the date Issuer  notifies  the
Grantee of its decision to so repurchase.



                                       6



     9. Repurchase of Option and/or Shares. (a) Repurchase; Repurchase Price.
Upon the occurrence of a Triggering Event, (i) at the request of a Holder,
delivered in writing within 135 days of such occurrence (or such later period as
provided in Section 2(d) with respect to any required notice or application or
in Section 12), Issuer shall repurchase the Option from the Holder, in whole or
in part, at a price (the "Option Repurchase Price") equal to the number of
shares of Common Stock then purchasable upon exercise of the Option (or such
lesser number of shares as may be designated in the repurchase notice)
multiplied by the amount by which the market/offer price (as defined below)
exceeds the Option Price and (ii) at the request of a Holder, delivered in
writing within 135 days of such occurrence (or such later period as provided in
Section 2(d) with respect to any required notice or application or in Section
12), Issuer shall repurchase such number of Option Shares from such Holder as
the Holder shall designate in the Repurchase Notice at a price (the "Option
Share Repurchase Price") equal to the number of shares designated multiplied by
the market/offer price. The term "market/offer price" shall mean the highest of
(x) the price per share of Common Stock at which a tender or exchange offer for
Common Stock has been made during the term of the Option, (y) the price per
share of Common Stock to be paid by any third party pursuant to an agreement
with Issuer with respect to a Business Combination Transaction (defined below)
and (z) the highest trading price for shares of Common Stock on the NYSE (or, if
the Common Stock is not then listed on the NYSE, any other national securities
exchange or automated quotation system on which the Common Stock is then listed
or quoted) within the six-month period immediately preceding the delivery of the
repurchase notice. In the event that a tender or exchange offer is made for the
Common Stock or an agreement is entered into for a merger, share exchange,
consolidation or reorganization involving consideration other than cash, the
value of the securities or other property issuable or deliverable in exchange
for the Common Stock shall (I) if such consideration is in securities and such
securities are listed on a national securities exchange, be determined to be the
highest trading price for such securities on such national securities exchange
within the six month period immediately preceding the delivery of the repurchase
notice or (II) if such consideration is not securities, or if in securities and
such securities are not traded on a national securities exchange, be determined
in good faith by a nationally recognized investment banking firm selected by an
investment banking firm designated by Grantee and an investment banking firm
designated by Issuer. "Business Combination Transaction" shall mean (i) a
consolidation, exchange of shares or merger of Issuer with any Person, other
than the Grantee or one of its subsidiaries, and, in the case of a merger, in
which Issuer shall not be the continuing or surviving corporation, (ii) a merger
of Issuer with a Person, other than the Grantee or one of its Subsidiaries, in
which Issuer shall be the continuing or surviving corporation but the then
outstanding shares of Common Stock shall be changed into or exchanged for stock
or other securities of Issuer or any other Person or cash or any other property
or the shares of Common Stock outstanding immediately before such merger shall
after such merger represent less than 50% of the common shares and common share
equivalents of Issuer outstanding immediately after the merger or (iii) a sale,
lease or other transfer of all or substantially all the assets of Issuer to any
Person, other than the Grantee or one of its Subsidiaries.



                                       7



      (b)  Method of  Repurchase.  A Holder  may  exercise  its right to require
Issuer to repurchase the Option,  in whole or in part,  and/or any Option Shares
then owned by such Holder  pursuant to this Section 9 by  surrendering  for such
purpose to Issuer, at its principal  office,  this Agreement or certificates for
Option Shares, as applicable, accompanied by a written notice or notices stating
that the Holder elects to require  Issuer to  repurchase  the Option and/or such
Option Shares in accordance  with the  provisions of this Section 9. As promptly
as practicable,  and in any event within three business days after the surrender
of the Option and/or certificates  representing Option Shares and the receipt of
the  repurchase  notice  relating  thereto,  Issuer shall deliver or cause to be
delivered to the Holder the applicable Option Repurchase Price and/or the Option
Share Repurchase Price subject to receipt by Issuer of a certificate executed by
the Holder containing  representations and warranties that, immediately prior to
the  repurchase  thereof  pursuant to this Section 9, the Holder had sole record
and  beneficial  ownership of the Option or the Option  Shares,  or both, as the
case may be, and that, other than pursuant to this Agreement,  the Option or the
Option  Shares,  or both,  as the case may be,  were  held free and clear of all
material  liens.  Any Holder shall have the right to require that the repurchase
of Option  Shares shall occur  immediately  after the exercise of all or part of
the Option. In the event that the repurchase notice shall request the repurchase
of the Option in part,  Issuer shall deliver with the Option  Repurchase Price a
new Stock Option  Agreement  evidencing the right of the Holder to purchase that
number of shares of Common Stock purchasable  pursuant to the Option at the time
of delivery of the repurchase  notice minus the number of shares of Common Stock
represented by that portion of the Option then being repurchased.

      (c) Effect of Statutory or  Regulatory  Restraints on  Repurchase.  To the
extent that,  upon or following the delivery of a repurchase  notice,  Issuer is
prohibited under  applicable law or regulation from  repurchasing the Option (or
portion thereof) and/or any Option Shares subject to such repurchase notice (and
Issuer will undertake to use its reasonable  best efforts to obtain all required
regulatory and legal  approvals and to file any required  notices as promptly as
practicable in order to accomplish such repurchase), Issuer shall immediately so
notify the Holder in writing and  thereafter  deliver or cause to be  delivered,
from time to time, to the Holder the portion of the Option  Repurchase Price and
the Option  Share  Repurchase  Price that  Issuer is no longer  prohibited  from
delivering,  within two business days after the date on which it is no longer so
prohibited;  provided,  however,  that upon notification by Issuer in writing of
such  prohibition,  the  Holder  may,  within  five  days  of  receipt  of  such
notification from Issuer,  revoke in writing its repurchase  notice,  whether in
whole or to the extent of the prohibition, whereupon, in the latter case, Issuer
shall  promptly (i) deliver to the Holder that portion of the Option  Repurchase
Price and/or the Option  Share  Repurchase  Price that Issuer is not  prohibited
from  delivering;  and (ii)  deliver to the  Holder,  as  appropriate,  (A) with
respect to the Option, a new Stock Option Agreement  evidencing the right of the
Holder  to  purchase  that  number  of  shares  of  Common  Stock  for which the
surrendered  Stock Option  Agreement was  exercisable at the time of delivery of
the  Repurchase  Notice  less  the  number  of  shares  as to which  the  Option
Repurchase Price has theretofore  been delivered to the Holder,  and/or (B) with
respect to Option  Shares,  a certificate  for the Option Shares as to which the
Option Share  Repurchase Price has not

                                       8



theretofore been delivered to the Holder. Notwithstanding anything to the
contrary in this Agreement, including, without limitation, the time limitations
on the exercise of the Option, the Holder may give notice of exercise of the
Option for 135 days after a notice of revocation has been issued pursuant to
this Section 9(c) and thereafter exercise the Option in accordance with the
applicable provisions of this Agreement.

      (d)  Acquisition  Transactions.  In addition to any other  restrictions or
covenants,  Issuer agrees that, in the event that a Holder delivers a repurchase
notice,  Issuer shall not enter or agree to enter into an agreement or series of
agreements relating to a merger with or into or the consolidation with any other
person or entity,  the sale of all or substantially  all of the assets of Issuer
or any similar  disposition  unless the other party or parties to such agreement
or agreements agree to assume in writing Issuer's obligations under Section 9(a)
and,  notwithstanding any notice of revocation delivered pursuant to the proviso
to Section  9(c),  a Holder may  require  such other party or parties to perform
Issuer's  obligations  under  Section  9(a)  unless  such party or  parties  are
prohibited by law or regulation from such performance,  in which case such party
or parties shall be subject to the obligations of the Issuer under Section 9(c).

      10. Repurchase at the Option of the Company.

      (a) To the extent the  Grantee  shall not have  previously  exercised  its
rights under Section 9, at the written request of Issuer made at any time during
the 135-day  period  commencing  at the  expiration  of the 135-day  periods for
exercise of rights under Section 9 (the "Call  Period"),  Issuer may  repurchase
from the  Holder,  and the  Holder  shall  sell,  or cause to be sold to Issuer,
three-quarters (but not less than  three-quarters) of the shares of Common Stock
acquired by the Holder  pursuant hereto and with respect to which the Holder has
ownership  at the time of such  repurchase  at a price  per  share  equal to the
greater of (A) the  market/offer  price (as  defined  in  Section 9,  except all
references to any repurchase notice shall instead be to the written request made
by Issuer  pursuant to this Section 10(a)) and (B) the Option Price per share in
respect of the shares so acquired  (the  higher of such per share  prices in (A)
and (B)  multiplied  by the number of shares of Common  Stock to be  repurchased
pursuant to this Section 10 being herein called the "Call  Consideration").  The
date on which the Company exercises its rights under this Section 10 is referred
to as the "Call Date."

      (b) If the Company  exercises  its rights  under this  Section 10,  Issuer
shall,  within three  business days pay the Call  Consideration  in  immediately
available funds and the Holder shall surrender to Issuer certificates evidencing
the shares of Common Stock purchased hereunder,  and the Holder shall warrant to
Issuer  that,  immediately  prior to the  repurchase  thereof  pursuant  to this
Section 10, the Holder had sole record and  beneficial  ownership of such shares
and that such shares were then held free and clear of all material liens.

      (c) To the extent that the Holder shall  exercise  the Option,  the Holder
shall,  unless the Holder shall exercise its rights under Section 9 to cause the
repurchase  of the  Option  Shares,  or  Issuer  shall  exercise  its  rights to
repurchase the Option Shares under this Section 10, retain sole ownership of the
Option Shares acquired through the end of the Call Period.



                                       9



      11. First Refusal.  Subject to the provisions of Sections 9 and 10 herein,
at any time after the first  occurrence  of a Triggering  Event and prior to the
second  anniversary  of the first purchase of shares of Common Stock pursuant to
the Option,  if the Holder shall desire to sell,  assign,  transfer or otherwise
dispose of all or any of the Option  Shares or other  securities  acquired by it
pursuant to the  Option,  it shall give Issuer  written  notice of the  proposed
transaction  (an  "Offeror's  Notice"),  identifying  the  proposed  transferee,
accompanied  by a copy of a  binding  offer to  purchase  such  shares  or other
securities signed by such transferee and setting forth the terms of the proposed
transaction.  An  Offeror's  Notice  shall be deemed  an offer by the  Holder to
Issuer, which may be accepted, in whole but not in part, within 20 business days
of the receipt of such Offeror's Notice, on the same terms and conditions and at
the same price at which  Issuer is  proposing  to transfer  such shares or other
securities  to such  transferee.  The  purchase  of any  such  shares  or  other
securities by Issuer shall be settled within 20 business days of the date of the
acceptance  of the offer and the  purchase  price shall be paid to the Holder in
immediately  available funds. If Issuer shall fail or refuse to purchase all the
shares or other  securities  covered by an  Offeror's  Notice,  the Holder  may,
within 60 days from the date of the  Offeror's  Notice,  sell all,  but not less
than all, of such shares or other  securities  to the proposed  transferee at no
less than the price  specified  and on terms no more  favorable  than  those set
forth in the Offeror's Notice;  provided,  however,  that the provisions of this
sentence  shall not limit the rights the Holder may otherwise have if Issuer has
accepted the offer contained in the Offeror's  Notice and wrongfully  refuses to
purchase the shares or other  securities  subject  thereto.  The requirements of
this Section 11 shall not apply to (a) any  disposition as a result of which the
proposed  transferee  would own beneficially not more than 2% of the outstanding
voting power of Issuer,  (b) any disposition of Common Stock or other securities
by a Person to whom the Holder has assigned its rights under the Option with the
consent of Issuer,  (c) any sale by means of a public offering  registered under
the  Securities  Act or (d) any  transfer to a wholly  owned  subsidiary  of the
Holder which agrees in writing to be bound by the terms hereof.

      12.  Extension of Exercise  Periods.  The 135-day  periods for exercise of
certain rights under Sections 2 and 9 shall be extended in each such case at the
request of the Holder to the extent  necessary to avoid  liability by the Holder
under Section 16(b) of the Securities Exchange Act of 1934, as amended ("Section
16(b)"),  by  reason of such  exercise.  Furthermore,  in the event the  Company
exercises its rights under Section 10, the Holder may defer the Call Date to the
extent necessary to avoid liability by the Holder under Section 16(b).

      13. Assignment.  Neither party may assign any of its rights or obligations
under this  Agreement  or the Option to any other  person  without  the  express
written consent of the other party. Any attempted assignment in contravention of
the preceding sentence shall be null and void.



                                       10



      14. Filings;  Other Actions.  The parties hereto will use their reasonable
best  efforts to make all filings  with,  and to obtain  consents  of, all third
parties and  governmental  authorities  necessary  for the  consummation  of the
transactions contemplated by this Agreement.

      15. Specific Performance. The parties acknowledge that damages would be an
inadequate  remedy for a breach of this  Agreement  by either party and that the
obligations of the parties shall be specifically  enforceable through injunctive
or other equitable relief.

      16.  Severability.  If  any  term,  provision,  covenant,  or  restriction
contained in this Agreement is held by a court or a federal or state  regulatory
agency of competent  jurisdiction  to be invalid,  void, or  unenforceable,  the
remainder of the terms,  provisions,  covenants,  and restrictions  contained in
this  Agreement  shall  remain in full force and effect,  and shall in no way be
affected,  impaired, or invalidated.  If for any reason such court or regulatory
agency determines that the Holder is not permitted to acquire,  or Issuer is not
permitted  to  repurchase  pursuant  to  Sections 9, 10 or 11 the full number of
shares of Common Stock  provided in Section 1(a) of this  Agreement (as adjusted
pursuant to Sections 1(b) and 7 of this Agreement),  it is the express intention
of Issuer to allow the Holder to acquire or to require Issuer to repurchase such
lesser  number  of  shares  as may be  permissible,  without  any  amendment  or
modification of this Agreement.

      17.  Notices.  Notices,  requests,  instructions  or other documents to be
given under this  Agreement  shall be in writing and shall be deemed given,  (i)
when  received,  if  sent  by  facsimile,  (ii)  when  delivered,  if  delivered
personally to the intended recipient,  and (iii) one business day later, if sent
by  overnight  delivery  via a  national  courier  service,  in each case at the
respective addresses of the parties set forth in the Merger Agreement.

      18. Expenses.  Except as otherwise expressly provided in this Agreement or
in the Merger Agreement, all costs and expenses incurred in connection with this
Agreement and the  transactions  contemplated by this Agreement shall be paid by
the  party  incurring  such  expense,  including  fees and  expenses  of its own
financial consultants, investment bankers, accountants, and counsel.

      19. Entire Agreement.  This Agreement,  the Confidentiality  Agreement (as
defined in the Merger Agreement) and the Merger Agreement  constitute the entire
agreement,   and   supersede   all  other  prior   agreements,   understandings,
representations and warranties, both written and oral, between the parties, with
respect to the subject  matter of this  Agreement.  The terms and  conditions of
this Agreement shall inure to the benefit of and be binding upon the parties and
their respective successors and permitted assigns. Nothing in this Agreement, is
intended  to confer  upon any person or entity,  other than the  parties to this
Agreement,  and their respective successors and permitted assigns, any rights or
remedies under this Agreement.



                                       11



      20.Governing Law and Venue; Waiver of Jury Trial.

      (a) This Agreement shall be deemed to be made in and in all respects shall
be  interpreted,  construed and governed by and in accordance  with Delaware law
without  regard  to  the  conflict  of  law  principles  thereof.   The  parties
irrevocably and unconditionally  consent to submit to the exclusive jurisdiction
of the  courts of the State of  Delaware  and of the  United  States of  America
located in  Wilmington,  Delaware  (the  "Delaware  Courts") for any  litigation
arising out of or relating to this Agreement and the  transactions  contemplated
by this  Agreement (and agree not to commence any  litigation  relating  thereto
except in such Delaware  Courts),  waive any objection to the laying of venue of
any such  litigation  in the Delaware  Courts and agree not to plead or claim in
any Delaware Court that such  litigation  brought therein has been brought in an
inconvenient forum.

      (b) EACH PARTY  ACKNOWLEDGES  AND AGREES  THAT ANY  CONTROVERSY  WHICH MAY
ARISE  UNDER THIS  AGREEMENT  IS LIKELY TO  INVOLVE  COMPLICATED  AND  DIFFICULT
ISSUES, AND THEREFORE EACH SUCH PARTY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY
RIGHT  SUCH  PARTY  MAY HAVE TO A TRIAL  BY JURY IN  RESPECT  OF ANY  LITIGATION
DIRECTLY OR  INDIRECTLY  ARISING OUT OF OR  RELATING TO THIS  AGREEMENT,  OR THE
TRANSACTIONS   CONTEMPLATED  BY  THIS   AGREEMENT.   EACH  PARTY  CERTIFIES  AND
ACKNOWLEDGES  THAT (i) NO  REPRESENTATIVE,  AGENT OR ATTORNEY OF THE OTHER PARTY
HAS REPRESENTED,  EXPRESSLY OR OTHERWISE, THAT THE OTHER PARTY WOULD NOT, IN THE
EVENT OF  LITIGATION,  SEEK TO ENFORCE  THE  FOREGOING  WAIVER,  (ii) EACH PARTY
UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (iii) EACH PARTY
MAKES THIS  WAIVER  VOLUNTARILY,  AND (iv) EACH PARTY HAS BEEN  INDUCED TO ENTER
INTO  THIS   AGREEMENT   BY,  AMONG  OTHER  THINGS,   THE  MUTUAL   WAIVERS  AND
CERTIFICATIONS IN THIS SECTION 20.

      21. Captions. The Section and paragraph captions in this Agreement are for
convenience  of reference  only, do not  constitute  part of this  Agreement and
shall not be deemed to limit or otherwise  affect any of the  provisions of this
Agreement.

      22. Limitation on Profit. (a) Notwithstanding any other provisions of this
Agreement including, without limitation,  Sections 8, 9, 10 and 11 hereof, in no
event  shall the  Grantee's  Total  Profit  (as  defined  herein)  exceed in the
aggregate $30 million (the "Maximum  Amount") and, if it otherwise  would exceed
such amount,  the Grantee,  at its sole election,  shall either:  (i) reduce the
number of shares of Common  Stock  subject to this  Option;  (ii) deliver to the
Issuer for cancellation Option Shares previously purchased by Grantee; (iii) pay
cash to the Issuer;  or (iv) any  combination  thereof,  so that Grantee's Total
Profit shall not exceed the Maximum  Amount  taking into  account the  foregoing
actions.



                                       12



      (b) Notwithstanding any other provision of this Agreement, this Option may
not be  exercised  for a number of shares as would,  as of the date of exercise,
result in a Notional  Total  Profit (as defined  below)  which would  exceed the
Maximum  Amount;  provided,  that nothing in this  sentence  shall  restrict any
exercise of the Option  permitted hereby on any subsequent date if such exercise
would not then be restricted by this Section 22(b).

      (c) As used in this Agreement, the "Total Profit" shall mean the aggregate
amount (before taxes) of the following:  (i) (x) the amount  received by Grantee
or  concurrently  being paid to Grantee  pursuant to Issuer's  repurchase of the
Option (or any portion  thereof) or any Option Shares pursuant to Sections 9, 10
or 11 less, in the case of any repurchase of Option  Shares,  (y) the Grantee `s
purchase  price  for  such  Option  Shares,  as the case may be and (ii) (x) the
amounts  received by Grantee or concurrently  being paid to Grantee  pursuant to
the sale of Option Shares (or any other securities into which such Option Shares
are converted or exchanged) to the Issuer or any other Person (as defined in the
Merger Agreement)  including sales made pursuant to a registration  statement or
an exemption  therefrom,  less (y) the Grantee's  purchase price for such Option
Shares.

      (d) As used in this  Agreement,  the term  "Notional  Total  Profit"  with
respect to any number of shares as to which  Grantee may propose to exercise the
Option  shall be the Total  Profit  determined  as of the date of such  proposal
assuming  that the Option were  exercised on such date for such number of shares
and assuming  that such shares,  together  with all other Option  Shares held by
Grantee and its  affiliates  as of such date,  were sold for cash at the closing
market price for the Common  Stock as of the close of business on the  preceding
trading day (less  customary  brokerage  commissions)  and including all amounts
theretofore  received or concurrently  being paid to Grantee pursuant to clauses
(i) and (ii) of the definition of Total Profit.



                                       13



      IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by
duly  authorized  officers of the  parties as of the day and year first  written
above.



                                          PREMARK INTERNATIONAL, INC.




                                          By:    /s/ James M. Ringler
                                                 -------------------------------
                                          Name:  James M. Ringler
                                          Title: Chairman of the Board, Chief
                                                 Executive Officer and President



                                          ILLINOIS TOOLWORKS INC.




                                          By:    /s/ W. James Farrell
                                                 -------------------------------
                                          Name:  W. James Farrell
                                          Title: Chairman and Chief Executive
                                                 Officer