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                                                                  EXHIBIT 10.17


THIS COMMERCIAL SECURITY AGREEMENT IS ENTERED INTO BETWEEN AMERICAN STONE
CORPORATION (REFERRED TO BELOW AS "GRANTOR"); AND FIRSTMERIT BANK, N.A.
(REFERRED TO BELOW AS "LENDER"). FOR VALUABLE CONSIDERATION, GRANTOR GRANTS TO
LENDER A SECURITY INTEREST IN THE COLLATERAL TO SECURE THE INDEBTEDNESS AND
AGREES THAT LENDER SHALL HAVE THE RIGHTS STATED IN THIS AGREEMENT WITH RESPECT
TO THE COLLATERAL, IN ADDITION TO ALL OTHER RIGHTS WHICH LENDER MAY HAVE BY
LAW.

DEFINITIONS. The following words shall have the following meanings when used in
this Agreement. Terms not otherwise defined in this Agreement shall have the
meanings attributed to such terms in the Uniform Commercial Code. All references
to dollar amounts shall mean amounts in lawful money of the United States of
America.

         AGREEMENT. The word "Agreement" means this Commercial Security
         Agreement, as this Commercial Security Agreement may be amended or
         modified from time to time, together with all exhibits and schedules
         attached to this Commercial Security Agreement from time to time.

         COLLATERAL. The word "Collateral" means the following described
         property of Grantor, whether now owned or hereafter acquired, whether
         now existing or hereafter arising, and wherever located:

                  ALL INVENTORY, ACCOUNTS, EQUIPMENT AND GENERAL INTANGIBLES

         In addition, the word "Collateral" includes all the following, whether
         now owned or hereafter acquired, whether now existing or hereafter
         arising, and wherever located:

                  (a) All attachments, accessions, accessories, tools, parts,
                  supplies, increases, and additions to and all replacements of
                  and substitutions for any property described above.

                  (b) All products and produce of any of the property described
                  in this Collateral section.

                  (c) All accounts, general intangibles, instruments, rents,
                  monies, payments, and all other rights, arising out of a sale,
                  lease, or other disposition of any of the property described
                  in this Collateral section.

                  (d) All proceeds (including insurance proceeds) from the sale,
                  destruction, loss, or other disposition of any of the property
                  described in this Collateral section.

                  (e) All records and data relating to any of the property
                  described in this Collateral section, whether in the form of a
                  writing, photograph, microfilm, microfiche, or electronic
                  media, together with all of Grantor's right, title, and
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                  interest in and to all computer software required to utilize,
                  create, maintain, and process any such records or data on
                  electronic media.

         EVENT OF DEFAULT. The words "Event of Default" mean and include without
         limitation any of the Events of Default set forth below in the section
         titled "Events of Default."

         GRANTOR. The word "Grantor" means American Stone Corporation, its
         successors and assigns.

         GUARANTOR. The word "Guarantor" means and includes without limitation
         each and all of the guarantors, sureties, and accommodation parties in
         connection with the Indebtedness.

         INDEBTEDNESS. The word "Indebtedness" means the indebtedness evidenced
         by the Note, including all principal and interest, together with all
         other indebtedness and costs and expenses for which Grantor is
         responsible under this Agreement or under any of the Related Documents.

         LENDER. The word "Lender" means FirstMerit Bank, N.A., its successors
         and assigns.

         NOTE. The word "Note" means the note or credit agreement dated November
         10, 1997, in the principal amount of $500,000.00 from American Stone
         Corporation to Lender, together with all renewals of, extensions of,
         modifications of, refinancings of, consolidations of and substitutions
         for the note or credit agreement.

         RELATED DOCUMENTS. The words "Related Documents" mean and include
         without limitation all promissory notes, credit agreements, loan
         agreements, environmental agreements, guaranties, security agreements,
         mortgages, deeds of trust, and all other instruments, agreements and
         documents, whether now or hereafter existing, executed in connection
         with the Indebtedness.

OBLIGATIONS OF GRANTOR.  Grantor warrants and covenants to Lender as follows:

         PERFECTION OF SECURITY INTEREST. Grantor agrees to execute such
         financing statements and to take whatever other actions are requested
         by Lender to perfect and continue Lender's security interest in the
         Collateral. Upon request of Lender, Grantor will deliver to Lender any
         and all of the documents evidencing or constituting the Collateral, and
         Grantor will note Lender's interest upon any and all chattel paper if
         not delivered to Lender for possession by Lender. Grantor hereby
         appoints Lender as its irrevocable attorney-in-fact for the purpose of
         executing any documents necessary to perfect or to continue the
         security interest granted in this Agreement. Lender may at any time,
         and without further authorization from Grantor, file a carbon,
         photographic or other reproduction of any financing statement or of
         this Agreement for use as a financing statement. Grantor will reimburse
         Lender for all expenses for the perfection and the continuation of the
         perfection of Lender's security interest in the Collateral. Grantor

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         promptly will notify Lender before any change in Grantor's name
         including any change to the assumed business names of Grantor.

         NO VIOLATION. The execution and delivery of this Agreement will not
         violate any law or agreement governing Grantor or to which Grantor is a
         party, and its certificate or articles of incorporation and bylaws or
         code of regulations do not prohibit any term or condition of this
         Agreement.

         ENFORCEABILITY OF COLLATERAL. To the extent the Collateral consists of
         accounts, chattel paper, or general intangibles, the Collateral is
         enforceable in accordance with its terms, is genuine, and complies with
         applicable laws concerning form, content and manner of preparation and
         execution, and all persons appearing to be obligated on the Collateral
         have authority and capacity to contract and are in fact obligated as
         they appear to be on the Collateral. At the time any account becomes
         subject to a security interest in favor of Lender, the account shall be
         a good and valid account representing an undisputed, bona fide
         indebtedness incurred by the account debtor, for merchandise held
         subject to delivery instructions or theretofore shipped or delivered
         pursuant to a contract of sale, or for services theretofore performed
         by Grantor with or for the account debtor; there shall be no setoffs or
         counterclaims against any such account; and no agreement under which
         any deductions or discounts may be claimed shall have been made with
         the account debtor except those disclosed to Lender in writing.

         LOCATION OF THE COLLATERAL. Grantor, upon request of Lender, will
         deliver to Lender in form satisfactory to Lender a schedule of real
         properties and Collateral locations relating to Grantor's operations,
         including without limitation the following: (a) all real property owned
         or being purchased by Grantor; (b) all real property being rented or
         leased by Grantor; (c) all storage facilities owned, rented, leased, or
         being used by Grantor; and (d) all other properties where Collateral is
         or may be located. Except in the ordinary course of its business,
         Grantor shall not remove the Collateral from its existing locations
         without the prior written consent of Lender.

         REMOVAL OF COLLATERAL. Grantor shall keep the Collateral (or to the
         extent the Collateral consists of intangible property such as accounts,
         the records concerning the Collateral) at Grantor's address shown
         above, or at such other locations as are acceptable to Lender. Except
         in the ordinary course of its business, including the sales of
         inventory, Grantor shall not remove the Collateral from its existing
         locations without the prior written consent of Lender. To the extent
         that the Collateral consists of vehicles, or other titled property,
         Grantor shall not take or permit any action which would require
         application for certificates of title for the vehicles outside the
         State of Ohio, without the prior written consent of Lender.

         TRANSACTIONS INVOLVING COLLATERAL. Except for inventory sold or
         accounts collected in the ordinary course of Grantor's business,
         Grantor shall not sell, offer to sell, or otherwise transfer or dispose
         of the Collateral. While Grantor is not in default under this
         Agreement, Grantor may sell inventory, but only in the ordinary course
         of its business

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         and only to buyers who quality as a buyer in the ordinary course of
         business. A sale in the ordinary course of Grantor's business does not
         include a transfer in partial or total satisfaction of a debt or any
         bulk sale. Grantor shall not pledge, mortgage, encumber or otherwise
         permit the Collateral to be subject to any lien, security interest,
         encumbrance, or charge, other than the security interest provided for
         in this Agreement, without the prior written consent of Lender. This
         includes security interests even if junior in right to the security
         interests granted under this Agreement. Unless waived by Lender, all
         proceeds from any disposition of the Collateral (for whatever reason)
         shall be held in trust for Lender and shall not be commingled with any
         other funds; provided however, this requirement shall not constitute
         consent by Lender to any sale or other disposition. Upon receipt,
         Grantor shall immediately deliver any such proceeds to Lender.

         TITLE. Grantor represents and warrants to Lender that it holds good and
         marketable title to the Collateral, free and clear of all liens and
         encumbrances except for the lien of this Agreement. No financing
         statement covering any of the Collateral is on file in any public
         office other than those which reflect the security interest created by
         this Agreement or to which Lender has specifically consented. Grantor
         shall defend Lender's rights in the Collateral against the claims and
         demands of all other persons.

         COLLATERAL SCHEDULES AND LOCATIONS. As often as Lender shall require,
         and insofar as the Collateral consists of accounts and general
         intangibles, Grantor shall deliver to Lender schedules of such
         Collateral, including such information as Lender may require, including
         without limitation names and addresses of account debtors and agings of
         accounts and general intangibles. Insofar as the Collateral consists of
         inventory and equipment, Grantor shall deliver to Lender, as often as
         Lender shall require, such lists, descriptions, and designations of
         such Collateral as Lender may require to identify the nature, extent,
         and location of such Collateral. Such information shall be submitted
         for Grantor and each of its subsidiaries or related companies.

         MAINTENANCE AND INSPECTION OF COLLATERAL. Grantor shall maintain all
         tangible Collateral in good condition and repair. Grantor will not
         commit or permit damage to or destruction of the Collateral or any part
         of the Collateral. Lender and its designated representatives and agents
         shall have the right at all reasonable times to examine, inspect, and
         audit the Collateral wherever located. Grantor shall immediately notify
         Lender of all cases involving the return, rejection, repossession, loss
         or damage of or to any Collateral; of any request for credit or
         adjustment or of any other dispute arising with respect to the
         Collateral; and generally of all happenings and events affecting the
         Collateral or the value or the amount of the Collateral.

         TAXES, ASSESSMENTS AND LIENS. Grantor will pay when due all taxes,
         assessments and liens upon the Collateral, its use or operation, upon
         this Agreement, upon any promissory note or notes evidencing the
         Indebtedness, or upon any of the other Related Documents. Grantor may
         withhold any such payment or may elect to contest any lien if Grantor
         is in good faith conducting an appropriate proceeding to contest the
         obligation to pay and so long as Lender's interest in the Collateral is
         not jeopardized in Lender's sole opinion. If

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         the Collateral is subjected to a lien which is not discharged within
         fifteen (15) days, Grantor shall deposit with Lender cash, a sufficient
         corporate surety bond or other security satisfactory to Lender in an
         amount adequate to provide for the discharge of the lien plus any
         interest, costs, attorneys' fees or other charges that could accrue as
         a result of foreclosure or sale of the Collateral. In any contest
         Grantor shall defend itself and Lender and shall satisfy any final
         adverse judgment before enforcement against the Collateral. Grantor
         shall name Lender as an additional obligee under any surety bond
         furnished in the contest proceedings.

         COMPLIANCE WITH GOVERNMENTAL REQUIREMENTS. Grantor shall comply
         promptly with all laws, ordinances, rules and regulations of all
         governmental authorities, now or hereafter in effect, applicable to the
         ownership, production, disposition, or use of the Collateral. Grantor
         may contest in good faith any such law, ordinance or regulation and
         withhold compliance during any proceeding, including appropriate
         appeals, so long as Lender's interest in the Collateral, in Lender's
         opinion, is not jeopardized.

         HAZARDOUS SUBSTANCES. Grantor represents and warrants that the
         Collateral never has been, and never will be so long as this Agreement
         remains a lien on the Collateral, used for the generation, manufacture,
         storage, transportation, treatment, disposal, release or threatened
         release of any hazardous waste or substance, as those terms are defined
         in the Comprehensive Environmental Response, Compensation, and
         Liability Act of 1980, as amended, 42 U.S.C. Section 9601, et seq.
         ("CERCLA"), the Superfund Amendments and Reauthorization Act of 1986,
         Pub. L. No. 99-499 ("SARA"), the Hazardous Materials Transportation
         Act, 49 U.S.C. Section 1801, et seq., the Resource Conservation and
         Recovery Act, 42 U.S.C. Section 6901, et seq., or other applicable
         state or Federal laws, rules, or regulations adopted pursuant to any of
         the foregoing. The terms "hazardous waste" and "hazardous substance"
         shall also include, without limitation, petroleum and petroleum
         by-products or any fraction thereof and asbestos. The representations
         and warranties contained herein are based on Grantor's due diligence in
         investigating the Collateral for hazardous wastes and substances.
         Grantor hereby (a) releases and waives any future claims against Lender
         for indemnity or contribution in the event Grantor becomes liable for
         cleanup or other costs under any such laws, and (b) agrees to indemnify
         and hold harmless Lender against any and all claims and losses
         resulting from a breach of this provision of this Agreement. This
         obligation to indemnify shall survive the payment of the Indebtedness
         and the satisfaction of this Agreement.

         MAINTENANCE OF CASUALTY INSURANCE. Grantor shall procure and maintain
         all risks insurance, including without limitation fire, theft and
         liability coverage together with such other insurance as Lender may
         require with respect to the Collateral, in form, amounts, coverages and
         basis reasonably acceptable to Lender and issued by a company or
         companies reasonably acceptable to Lender. Grantor, upon request of
         Lender, will deliver to Lender from time to time the policies or
         certificates of insurance in form satisfactory to Lender, including
         stipulations that coverages will not be cancelled or diminished without
         at least ten (10) days' prior written notice to Lender and not
         including any disclaimer of the insurer's liability for failure to give
         such a notice. Each insurance

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         policy also shall include an endorsement providing that coverage in
         favor of Lender will not be impaired in any way by any act, omission or
         default of Grantor or any other person. In connection with all policies
         covering assets in which Lender holds or is offered a security
         interest, Grantor will provide Lender with such loss payable or other
         endorsements as Lender may require. If Grantor at any time fails to
         obtain or maintain any insurance as required under this Agreement,
         Lender may (but shall not be obligated to) obtain such insurance as
         Lender deems appropriate, including if it so chooses "single interest
         insurance," which will cover only Lender's interest in the Collateral.

         APPLICATION OF INSURANCE PROCEEDS. Grantor shall promptly notify Lender
         of any loss or damage to the Collateral. Lender may make proof of loss
         if Grantor fails to do so within fifteen (15) days of the casualty. All
         proceeds of any insurance on the Collateral, including accrued proceeds
         thereon, shall be held by Lender as part of the Collateral. If Lender
         consents to repair or replacement of the damaged or destroyed
         Collateral, Lender shall, upon satisfactory proof of expenditure, pay
         or reimburse Grantor from the proceeds for the reasonable cost of
         repair or restoration. If Lender does not consent to repair or
         replacement of the Collateral, Lender shall retain a sufficient amount
         of the proceeds to pay all of the Indebtedness, and shall pay the
         balance to Grantor. Any proceeds which have not been disbursed within
         six (6) months after their receipt and which Grantor has not committed
         to the repair or restoration of the Collateral shall be used to prepay
         the Indebtedness.

         INSURANCE RESERVES. Lender may require Grantor to maintain with Lender
         reserves for payment of insurance premiums, which reserves shall be
         created by monthly payments from Grantor of a sum estimated by Lender
         to be sufficient to produce, at least fifteen (15) days before the
         premium due date, amounts at least equal to the insurance premiums to
         be paid. It fifteen (15) days before payment is due, the reserve funds
         are insufficient, Grantor shall upon demand pay any deficiency to
         Lender. The reserve funds shall be held by Lender as a general deposit
         and shall constitute a non-interest-bearing account which Lender may
         satisfy by payment of the insurance premiums required to be paid by
         Grantor as they become due. Lender does not hold the reserve funds in
         trust for Grantor, and Lender is not the agent of Grantor for payment
         of the insurance premiums required to be paid by Grantor. The
         responsibility for the payment of premiums shall remain Grantor's sole
         responsibility.

         INSURANCE REPORTS. Grantor, upon request of Lender, shall furnish to
         Lender reports on each existing policy of insurance showing such
         information as Lender may reasonably request including the following:
         (a) the name of the insurer; (b) the risks insured; (c) the amount of
         the policy; (d) the property insured; (e) the then current value on the
         basis of which insurance has been obtained and the manner of
         determining that value; and (f) the expiration date of the policy. In
         addition, Grantor shall upon request by Lender (however not more often
         than annually) have an independent appraiser satisfactory to Lender
         determine, as applicable, the cash value or replacement cost of the
         Collateral.

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GRANTOR'S RIGHT TO POSSESSION AND TO COLLECT ACCOUNTS. Until default and except
as otherwise provided below with respect to accounts, Grantor may have
possession of the tangible personal property and beneficial use of all the
Collateral and may use it in any lawful manner not inconsistent with this
Agreement or the Related Documents, provided that Grantor's right to possession
and beneficial use shall not apply to any Collateral where possession of the
Collateral by Lender is required by law to perfect Lender's security interest in
such Collateral. Until otherwise notified by Lender, Grantor may collect any of
the Collateral consisting of accounts. At any time and even though no Event of
Default exists, Lender may exercise its rights to collect the accounts and to
notify account debtors to make payments directly to Lender for application to
the Indebtedness. If Lender at any time has possession of any Collateral,
whether before or after an Event of Default, Lender shall be deemed to have
exercised reasonable care in the custody and preservation of the Collateral if
Lender takes such action for that purpose as Grantor shall request or as Lender,
in Lender's sole discretion, shall deem appropriate under the circumstances, but
failure to honor any request by Grantor shall not of itself be deemed to be a
failure to exercise reasonable care. Lender shall not be required to take any
steps necessary to preserve any rights in the Collateral against prior parties,
nor to protect, preserve or maintain any security interest given to secure the
Indebtedness.

EXPENDITURES BY LENDER. If not discharged or paid when due, Lender may (but
shall not be obligated to) discharge or pay any amounts required to be
discharged or paid by Grantor under this Agreement, including without limitation
all taxes, liens, security interests, encumbrances, and other claims, at any
time levied or placed on the Collateral. Lender also may (but shall not be
obligated to) pay all costs for insuring, maintaining and preserving the
Collateral. All such expenditures incurred or paid by Lender for such purposes
will then bear interest at the rate charged under the Note from the date
incurred or paid by Lender to the date of repayment by Grantor. All such
expenses shall become a part of the Indebtedness and, at Lender's option, will
(a) be payable on demand, (b) be added to the balance of the Note and be
apportioned among and be payable with any installment payments to become due
during either (I) the term of any applicable insurance policy or (II) the
remaining term of the Note, or (c) be treated as a balloon payment which will be
due and payable at the Note's maturity. This Agreement also will secure payment
of these amounts. Such right shall be in addition to all other rights and
remedies to which Lender may be entitled upon the occurrence of an Event of
Default.

EVENTS OF DEFAULT. Each of the following shall constitute an Event of Default
under this Agreement:

         DEFAULT ON INDEBTEDNESS. Failure of Grantor to make any payment when
         due on the Indebtedness.

         OTHER DEFAULTS. Failure of Grantor to comply with or to perform any
         other term, obligation, covenant or condition contained in this
         Agreement or in any of the Related Documents or in any other agreement
         between Lender and Grantor.

         DEFAULT IN FAVOR OF THIRD PARTIES. Should Borrower or any Grantor
         default under any loan, extension of credit, security agreement,
         purchase or sales agreement, or any other

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         agreement, in favor of any other creditor or person that may materially
         affect any of Borrower's property or Borrower's or any Grantor's
         ability to repay the Loans or perform their respective obligations
         under this Agreement or any of the Related Documents.

         FALSE STATEMENTS. Any warranty, representation or statement made or
         furnished to Lender by or on behalf of Grantor under this Agreement,
         the Note or the Related Documents is false or misleading in any
         material respect, either now or at the time made or furnished.

         DEFECTIVE COLLATERALIZATION. This Agreement or any of the Related
         Documents ceases to be in full force and effect (including failure of
         any collateral documents to create a valid and perfected security
         interest or lien) at any time and for any reason.

         INSOLVENCY. The dissolution or termination of Grantor's existence as a
         going business, the insolvency of Grantor, the appointment of a
         receiver for any part of Grantor's property, any assignment for the
         benefit of creditors, any type of creditor workout, or the commencement
         of any proceeding under any bankruptcy or insolvency laws by or against
         Grantor.

         CREDITOR OR FORFEITURE PROCEEDINGS. Commencement of foreclosure or
         forfeiture proceedings, whether by judicial proceeding, self-help,
         repossession or any other method, by any creditor of Grantor or by any
         governmental agency against the Collateral or any other collateral
         securing the Indebtedness. This includes a garnishment of any of
         Grantor's deposit accounts with Lender. However, this Event of Default
         shall not apply if there is a good faith dispute by Grantor as to the
         validity or reasonableness of the claim which is the basis of the
         creditor or forfeiture proceeding and if Grantor gives Lender written
         notice of the creditor or forfeiture proceeding and deposits with
         Lender monies or a surety bond for the creditor or forfeiture
         proceeding, in an amount determined by Lender, in its sole discretion,
         as being an adequate reserve or bond for the dispute.

         EVENTS AFFECTING GUARANTOR. Any of the preceding events occurs with
         respect to any Guarantor of any of the Indebtedness or such Guarantor
         dies or becomes incompetent. Lender, at its option, may, but shall not
         be required to, permit the Guarantor's estate to assume unconditionally
         the obligations arising under the guaranty in a manner satisfactory to
         Lender, and, in doing so, cure the Event of Default.

         ADVERSE CHANGE. A material adverse change occurs in Grantor's financial
         condition, or Lender believes the prospect of payment or performance of
         the Indebtedness is impaired.

         INSECURITY.  Lender, in good faith, deems itself insecure.

         RIGHT TO CURE. If any default, other than a Default on Indebtedness, is
         curable and if Grantor has not been given a prior notice of a breach of
         the same provision of this Agreement, it may be cured (and no Event of
         Default will have occurred) if Grantor, after Lender sends written
         notice demanding cure of such default, (a) cures the default within

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         fifteen (15) days; or (b), if the cure requires more than fifteen (15)
         days, immediately initiates steps which Lender deems in Lender's sole
         discretion to be sufficient to cure the default and thereafter
         continues and completes all reasonable and necessary steps sufficient
         to produce compliance as soon as reasonably practical.

RIGHTS AND REMEDIES ON DEFAULT. If an Event of Default occurs under this
Agreement, at any time thereafter, Lender shall have all the rights of a secured
party under the Ohio Uniform Commercial Code. In addition and without
limitation, Lender may exercise any one or more of the following rights and
remedies:

         ACCELERATE INDEBTEDNESS. Lender may declare the entire Indebtedness,
         including any prepayment penalty which Grantor would be required to
         pay, immediately due and payable, without notice.

         ASSEMBLE COLLATERAL. Lender may require Grantor to deliver to Lender
         all or any portion of the Collateral and any and all certificates of
         title and other documents relating to the Collateral. Lender may
         require Grantor to assemble the Collateral and make it available to
         Lender at a place to be designated by Lender. Lender also shall have
         full power to enter upon the property of Grantor to take possession of
         and remove the Collateral. If the Collateral contains other goods not
         covered by this Agreement at the time of repossession, Grantor agrees
         Lender may take such other goods, provided that Lender makes reasonable
         efforts to return them to Grantor after repossession.

         SELL THE COLLATERAL. Lender shall have full power to sell, lease,
         transfer, or otherwise deal with the Collateral or proceeds thereof
         in its own name or that of Grantor. Lender may sell the Collateral at
         public auction or private sale. Unless the Collateral threatens to
         decline speedily in value or is of a type customarily sold on a
         recognized market, Lender will give Grantor reasonable notice of the
         time after which any private sale or any other intended disposition of
         the Collateral is to be made. The requirements of reasonable notice
         shall be met if such notice is given at least ten (10) days before the
         time of the sale or disposition. All expenses relating to the
         disposition of the Collateral, including without limitation the
         expenses of retaking, holding, insuring, preparing for sale and
         selling the Collateral, shall become a part of the Indebtedness
         secured by this Agreement and shall be payable on demand, with
         interest at the Note rate from date of expenditure until repaid.

         APPOINT RECEIVER. To the extent permitted by applicable law, Lender
         shall have the following rights and remedies regarding the appointment
         of a receiver: (a) Lender may have a receiver appointed as a matter of
         right, (b) the receiver may be an employee of Lender and may serve
         without bond, and (c) all fees of the receiver and his or her attorney
         shall become part of the Indebtedness secured by this Agreement and
         shall be payable on demand, with interest at the Note rate from date of
         expenditure until repaid.

         COLLECT REVENUES, APPLY ACCOUNTS. Lender, either itself or through a
         receiver, may collect the payments, rents, income, and revenues from
         the Collateral. Lender may at any

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         time in its discretion transfer any Collateral into its own name or
         that of its nominee and receive the payments, rents, income, and
         revenues therefrom and hold the same as security for the Indebtedness
         or apply it to payment of the Indebtedness in such order of preference
         as Lender may determine. Insofar as the Collateral consists of
         accounts, general intangibles, insurance policies, instruments, chattel
         paper, choses in action, or similar property, Lender may demand,
         collect, receipt for, settle, compromise, adjust, sue for, foreclose,
         or realize on the Collateral as Lender may determine, whether or not
         indebtedness or Collateral is then due. For these purposes, Lender may,
         on behalf of and in the name of Grantor, receive, open and dispose of
         mail addressed to Grantor; change any address to which mail and
         payments are to be sent, and endorse notes, checks, drafts, money
         orders, documents of title, instruments and items pertaining to
         payment, shipment, or storage of any Collateral. To facilitate
         collection, Lender may notify account debtors and obligors on any
         Collateral to make payments directly to Lender.

         OBTAIN DEFICIENCY. If Lender chooses to sell any or all of the
         Collateral, Lender may obtain a judgment against Grantor for any
         deficiency remaining on the Indebtedness due to Lender after
         application of all amounts received from the exercise of the rights
         provided in this Agreement. Grantor shall be liable for a deficiency
         even if the transaction described in this subsection is a sale of
         accounts or chattel paper.

         OTHER RIGHTS AND REMEDIES. Lender shall have all the rights and
         remedies of a secured creditor under the provisions of the Uniform
         Commercial Code, as may be amended from time to time. In addition,
         Lender shall have and may exercise any or all other rights and remedies
         it may have available at law, in equity, or otherwise.

         CUMULATIVE REMEDIES. All of Lender's rights and remedies, whether
         evidenced by this Agreement or the Related Documents or by any other
         writing, shall be cumulative and may be exercised singularly or
         concurrently. Election by Lender to pursue any remedy shall not exclude
         pursuit of any other remedy, and an election to make expenditures or to
         take action to perform an obligation of Grantor under this Agreement,
         after Grantor's failure to perform, shall not affect Lender's right to
         declare a default and to exercise its remedies.

MISCELLANEOUS PROVISIONS. The following miscellaneous provisions are a part of
this Agreement:

         AMENDMENTS. This Agreement, together with any Related Documents,
         constitutes the entire understanding and agreement of the parties as to
         the matters set forth in this Agreement. No alteration of or amendment
         to this Agreement shall be effective unless given in writing and signed
         by the party or parties sought to be charged or bound by the alteration
         or amendment.

         APPLICABLE LAW. This Agreement has been delivered to Lender and
         accepted by Lender in the State of Ohio. If there is a lawsuit, Grantor
         agrees upon Lender's request to submit to the jurisdiction of the
         courts of the State of Ohio. Lender and Grantor hereby waive

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<PAGE>   11

         the right to any jury trial in any action, proceeding, or counterclaim
         brought by either Lender or Grantor against the other. This Agreement
         shall be governed by and construed in accordance with the laws of the
         State of Ohio.

         ATTORNEYS' FEES; EXPENSES. Grantor agrees to pay upon demand all of
         Lender's costs and expenses, including attorneys' fees and Lender's
         legal expenses, incurred in connection with the enforcement of this
         Agreement. Lender may pay someone else to help enforce this Agreement,
         and Grantor shall pay the costs and expenses of such enforcement. Costs
         and expenses include Lender's attorneys' fees and legal expenses
         whether or not there is a lawsuit, including attorneys' fees and legal
         expenses for bankruptcy proceedings (and including efforts to modify or
         vacate any automatic stay or injunction), appeals, and any anticipated
         post-judgment collection services. Grantor also shall pay all court
         costs and such additional fees as may be directed by the court.

         CAPTION HEADINGS. Caption headings in this Agreement are for
         convenience purposes only and are not to be used to interpret or define
         the provisions of this Agreement.

         MULTIPLE PARTIES; CORPORATE AUTHORITY. All obligations of Grantor under
         this Agreement shall be joint and several, and all references to
         Grantor shall mean each and every Grantor. This means that each of the
         persons signing below is responsible for all obligations in this
         Agreement.

         NOTICES. All notices required to be given under this Agreement shall be
         given in writing, may be sent by telefacsimile, and shall be effective
         when actually delivered or when deposited with a nationally recognized
         overnight courier or deposited in the United States mail, first class,
         postage prepaid, addressed to the party to whom the notice is to be
         given at the address shown above. Any party may change its address for
         notices under this Agreement by giving formal written notice to the
         other parties, specifying that the purpose of the notice is to change
         the party's address. To the extent permitted by applicable law, if
         there is more than one Grantor, notice to any Grantor will constitute
         notice to all Grantors. For notice purposes, Grantor will keep Lender
         informed at all times of Grantor's current address(es).

         POWER OF ATTORNEY. Grantor hereby appoints Lender as its true and
         lawful attorney-in-fact, irrevocably, with full power of substitution
         to do the following: (a) to demand, collect, receive, receipt for, sue
         and recover all sums of money or other property which may now or
         hereafter become due, owing or payable from the Collateral; (b) to
         execute, sign and endorse any and all claims, instruments, receipts,
         checks, drafts or warrants issued in payment for the Collateral; (c) to
         settle or compromise any and all claims arising under the Collateral,
         and, in the place and stead of Grantor, to execute and deliver its
         releases and settlement for the claim; and (d) to file any claim or
         claims or to take any action or institute or take part in any
         proceedings, either in its own name or in the name of Grantor, or
         otherwise, which in the discretion of Lender may seem to be necessary
         or advisable. This power is given as security for the Indebtedness, and
         the authority hereby

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<PAGE>   12

         conferred is and shall be irrevocable and shall remain in full force
         and effect until renounced by Lender.

         SEVERABILITY. If a court of competent jurisdiction finds any provision
         of this Agreement to be invalid or unenforceable as to any person or
         circumstance, such finding shall not render that provision invalid or
         unenforceable as to any other persons or circumstances. If feasible,
         any such offending provision shall be deemed to be modified to be
         within the limits of enforceability or validity; however, if the
         offending provision cannot be so modified, it shall be stricken and all
         other provisions of this Agreement in all other respects shall remain
         valid and enforceable.

         SUCCESSOR INTERESTS. Subject to the limitations set forth above on
         transfer of the Collateral, this Agreement shall be binding upon and
         inure to the benefit of the parties, their successors and assigns.

         WAIVER. Lender shall not be deemed to have waived any rights under this
         Agreement unless such waiver is given in writing and signed by Lender.
         No delay or omission on the part of Lender in exercising any right
         shall operate as a waiver of such right or any other right. A waiver by
         Lender of a provision of this Agreement shall not prejudice or
         constitute a waiver of Lender's right otherwise to demand strict
         compliance with that provision or any other provision of this
         Agreement. No prior waiver by Lender, nor any course of dealing between
         Lender and Grantor, shall constitute a waiver of any of Lender's rights
         or of any of Grantor's obligations as to any future transactions.
         Whenever the consent of Lender is required under this Agreement, the
         granting of such consent by Lender in any instance shall not constitute
         continuing consent to subsequent instances where such consent is
         required and in all cases such consent may be granted or withheld in
         the sole discretion of Lender.

GRANTOR ACKNOWLEDGES HAVING READ ALL THE PROVISIONS OF THIS COMMERCIAL SECURITY
AGREEMENT, AND GRANTOR AGREES TO ITS TERMS. THIS AGREEMENT IS DATED NOVEMBER 10,
1997.

GRANTOR:

AMERICAN STONE CORPORATION

BY:  /S/ DAVID TYRRELL
     ------------------------------
         DAVID TYRRELL, PRESIDENT

LENDER:

FIRSTMERIT BANK, N.A.

BY:  /S/ LAWRENCE ALLEN
     ------------------------------
         AUTHORIZED OFFICER

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