<PAGE>

EXHIBIT 10.11

                         COMMERCIAL SECURITY AGREEMENT

<TABLE>
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<S>                 <C>          <C>         <C>        <C>       <C>         <C>         <C>         <C>
Principal           Loan Date    Maturity    Loan No    Call      Collateral  Account     Officer     Initials
$1,000,000                       5-15-2000   53104                   19                     501
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 References in the shaded area are for Lender's use only and do not limit the applicability of this
 document to any particular loan or item.
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</TABLE>

<TABLE>
<S>                                             <C>
Borrower:  CARBITE, INC.                        Lender:  Scripps Bank
           6330 NANCY RIDGE ROAD, SUITE 107              Corporate Lending - Kearny Mesa
           SAN DIEGO, CA 92121                           9005 Complex Drive
                                                         San Diego, CA  92123
</TABLE>

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THIS COMMERCIAL SECURITY AGREEMENT is entered into between CARBITE, INC.
(referred to below as "Grantor"); and Scripps Bank (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, chattel paper, accounts, equipment and general
          intangibles, together with the following specifically described
          property: investment Property & Fixtures

     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, 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 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 CARBITE, INC., 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 Note dated October 28, 1998 in
     the principal amount of $300,000.00 & increased to $1,000,000.00 by Change
     in Terms Agreement dated May 12, 1999 and Note dated November 30, 1998 in
     the principal amount of $60,000.00 from Grantor to Lender, together with
     all renewals of, extensions of, modifications of, refinancings of,
     consolidations of and substitutions for the note or credit agreement.

     Lender. The word "Lender" means Scripps Bank, its successors and assigns.

     Note. The word "Note" means the Change in Terms Agreement between Borrower
     and Lender dated May 12, 1999, which modifies the following described
     existing indebtedness:

     AS EVIDENCED BY:

     PROMISSORY NOTE DATED OCTOBER 28, 1998 IN THE AMOUNT OF $300,000.00

     CHANGE IN TERMS AGREEMENT DATED FEBRUARY 22, 1999 IN THE AMOUNT OF
     $540,000.00

     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.

RIGHT OF SETOFF.  Grantor hereby grants Lender a contractual security interest
in and hereby assigns, conveys, delivers, pledges, and transfers all of
Grantor's right, title and interest in and to Grantor's accounts with Lender
(whether checking, savings, or some other account), including all accounts held
jointly with someone else and all accounts Grantor may open in the future,
excluding, however, all IRA and Keogh accounts, and all trust accounts for which
the grant of a security interest would be prohibited by law.  Grantor authorizes
Lender, to the extent permitted by applicable law, to charge or setoff all
indebtedness against any and all such accounts.

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

                                                                          Page 2

     Perfection of Security Interest. Grantor agrees to execute such financing
     statements and to take whatever 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 continuation
     of the perfection of Lender's security interest in the Collateral. Grantor
     promptly will notify Lender before any change in Grantor's name including
     any change to the assumed business name of Grantor. This is a continuing
     Security Agreement and will continue in effect even though all or any part
     of the indebtedness is paid in full and even though for a period of time
     Grantor may not be indebted to Lender.

     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 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 any 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 California, 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 and only to
     buyers who qualify 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 of 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 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 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., Chapters 6.5 through 7.7 of Division 20 of the California Health
     and Safety Code, Section 25100, 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
<PAGE>

                                                                          Page 3

     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
     canceled 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 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 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. If
     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.

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 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.
<PAGE>

                                                                          Page 4

     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 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 California 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, or such lesser time as required by state law, 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 by itself or through a
     receiver, may collect the payments, rents, income, and revenues from the
     Collateral. Lender may at any 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, ir 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 California. If there is a lawsuit, Grantor agrees
     upon Lender's request to submit to the jurisdiction of the courts of the
     State of California. This Agreement shall be governed by and construed in
     accordance with the laws of the State of California.

     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
<PAGE>

                                                                          Page 5

     automatic stay or injunction), appeals, and any anticipate 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 (unless otherwise required
     by law), 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 release 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 conferred is and shall be irrevocable and shall remain in
     full force and effect until renounced by Lender.

     Preference Payments. Any monies Lender pays because of an asserted
     preference claim in Borrower's bankruptcy will become a part of the
     indebtedness and, at Lender's option, shall be payable by Borrower as
     provided above in the "EXPENDITURES BY LENDER" paragraph.

     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.

     Waiver of Co-obligor's Rights. If more than one person is obligated for the
     indebtedness. Borrower irrevocably waivers, disclaims and relinquishes all
     claims against such other person which Borrower has or would otherwise have
     by virtue of payment of the indebtedness or any part thereof, specifically
     including but not limited to all rights of indemnity, contribution or
     exoneration.

ADDITIONAL PROVISIONS.  This Security Agreement is backed by UCC-1 filed
November 9, 1998 as file #9831661571.

GRANTOR ACKNOWLEDGES HAVING READ ALL THE PROVISIONS OF THIS COMMERCIAL SECURITY
AGREEMENT, AND GRANTOR AGREES TO ITS TERMS.  THIS AGREEMENT IS DATED MAY 12,
1999.

GRANTOR:

CARBITE, INC.


By: ___________________________________   By: __________________________________
    CHESTER S. SHIRA, Chairman                Michael A. Spacciapolli, President

<PAGE>

EXHIBIT 10.11

                                PROMISSORY NOTE

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------------
Principal     Loan Date       Maturity      Loan No       Call        Collateral    Account       Officer       Initials
<S>          <C>             <C>            <C>           <C>         <C>           <C>           <C>           <C>
$300,000     10-28-1998      5-15-1999       53104                        19                        501
---------------------------------------------------------------------------------------------------------------------------
    References in the shaded area are for Lender's use only and do not limit the applicability of this document to any
 particular loan or item
---------------------------------------------------------------------------------------------------------------------------
</TABLE>

Borrower: CARBITE, INC.                      Lender: Scripps Bank
          6330 NANCY RIDGE ROAD, SUITE 107           Corporate Lending
          SAN DIEGO, CA 92121                        9005 Complex Drive
                                                     San Diego, CA 92123

<TABLE>
<S>                                 <C>                        <C>
Principal Amount: $300,000.00       Initial Rate: 10.000       Date of Note: October 28, 1998
</TABLE>

PROMISE TO PAY. CARBITE, INC. ("Borrower") promises to pay to Scripps Bank
("Lender"), or order, in lawful money of the United States of America, the
principal amount of Three Hundred Thousand & 00/100 Dollars ($300,000.00) or so
much as may be outstanding, together with interest on the unpaid outstanding
principal balance of each advance. Interest shall be calculated from the date of
each advance until repayment of each advance.

PAYMENT. Borrower will pay this loan on demand, or if no demand is made, in one
payment of all outstanding principal plus all accrued unpaid interest on May 15,
199.9. In addition, Borrower will pay regular monthly payments of accrued unpaid
interest beginning November 15, 1998, and all subsequent interest payments are
due on the same day of each month after that. Interest on this Note is computed
on a 365/365 simple interest basis; that is, by applying the ratio of the annual
interest rate over the number of days in a year, multiplied by the outstanding
principal balance, multiplied by the actual number of days the principal balance
is outstanding. Borrower will pay Lender at Lender's address shown above or at
such other place as Lender may designate in writing. Unless otherwise agreed or
required by applicable law, payments will be applied first to accrued unpaid
interest, then to principal, and any remaining amount to any unpaid collection
costs and late charges.

VARIABLE INTEREST RATE. The interest rate on this Note is subject to change from
time to time based on changes in an independent index which is the Wall Street
Journal Prime Rate as published in the Money Rates section. When a range of rate
is shown, the higher rate will be used. (the "Index"). The Index is not
necessarily the lowest rate charged by Lender on its loans. If the Index becomes
unavailable during the term of this loan, Lender may designate a substitute
index after notice to Borrower. Lender will tell Borrower the current index rate
upon Borrower's request. Borrower understands that Lender may make loans based
on other rates as well. The interest rate change will not occur more often than
each time that Prime Rate changes as shown in the Money Rates section of the
Wall Street Journal. The index currently is 8.000% per annum. The interest rate
to be applied to the unpaid principal balance of this Note will be at a rate of
2.000 percentage points over the index, resulting in an initial rate of 10.000%
per annum. NOTICE: Under no circumstances will the interest rate on this Note be
more than the maximum rate allowed by applicable law.

PREPAYMENT; MINIMUM INTEREST CHARGE. Borrower agrees that all loan fees and
other prepaid finance charges are earned fully as of the date of the loan and
will not be subject to refund upon early payment (whether voluntary or as a
result of default), except as otherwise required by law. In any event, even upon
full prepayment of this Note, Borrower understands that Lender is entitled to a
minimum interest charge of $100.00. Other than Borrower's obligation to pay any
minimum interest charge, Borrower may pay without penalty all or a portion of
the amount owed earlier than it is due. Early payments will not, unless agreed
to by Lender in writing, relieve Borrower of Borrower's obligation to continue
to make payments of accrued unpaid interest. Rather, they will reduce the
principal balance due.

LATE CHARGE. If a payment is 10 days or more late, Borrower will be charged
5.000% of the regularly scheduled payment or $5.00, whichever is greater.

DEFAULT. Borrower will be in default if any of the following happens: (a)
Borrower fails to make any payment when due. (b) Borrower breaks any promise
Borrower has made to Lender, or Borrower fails to comply with or to perform when
due any other term, obligation, covenant, or condition contained in this Note or
any agreement related to this Note, or in any other agreement or loan Borrower
has with Lender. (c) Borrower defaults under any loan, extension of credit,
security agreement, purchase or sales agreement, or any other agreement, in
favor of any other creditor or person that may materially affect any of
Borrower's property or Borrower's ability to repay this Note or perform
Borrower's obligations under this Note or any of the Related Documents. (d) Any
representation or statement made or furnished to Lender by Borrower or on
Borrower's behalf is false or misleading in any material
<PAGE>

respect either now or at the time made or furnished. (e) Borrower becomes
insolvent, a receiver is appointed for any part of Borrower's property, Borrower
makes an assignment for the benefit of creditors, or any proceeding is commenced
either by Borrower or against Borrower under any bankruptcy or insolvency laws.
(f) Any creditor tries to take any of Borrower's property on or in which Lender
has a lien or security interest. This includes a garnishment of any of
Borrower's accounts with Lender. (g) Any guarantor dies or any of the other
events described in this default section occurs with respect to any guarantor of
this Note. (h) A material adverse change occurs in Borrower's financial
condition, or Lender believes the prospect of payment or performance of the
Indebtedness is impaired. (I) Lender in good faith deems itself insecure.

If any default, other than a default in payment, is curable and if Borrower has
not been given a notice of a breach of the same provision of this Note within
the preceding twelve (12) months, it may be cured (and no event of default will
have occurred) if Borrower, after receiving written notice from Lender demanding
cure of such default: (a) cures the default within 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.

LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal
balance on this Note and all accrued unpaid interest immediately due, without
notice, and then Borrower will pay that amount. Upon Borrower's failure to pay
all amounts declared due pursuant to this section, including failure to pay upon
final maturity, Lender, at its option, may also, if permitted under applicable
law, do one or both of the following: (a) increase the variable interest rate
on this Note to 7.000 percentage points over the index, and (b) add any unpaid
accrued interest to principal and such sum will bear interest therefrom until
paid at the rate provided in this Note (Including any increased rate). Lender
may hire or pay someone else to help collect this Note if Borrower does not pay.
Borrower also will pay Lender that amount. This includes, subject to any limits
under applicable law, Lender's attorneys' fees and Lender's legal expenses
whether or not there is a lawsuit, including attorneys' fees and legal expenses
for bankruptcy proceedings (including efforts to modify or vacate any automatic
stay or injunction), appeals, and any anticipated post-judgment collection
services. Borrower also will pay any court costs, in addition to all other sums
provided by law. This Note has been delivered to Lender and accepted by Lender
in the State of California. if there is a lawsuit, Borrower agrees upon Lender's
request to submit to the jurisdiction of the courts of San Diego County, the
State of California. This Note shall be governed by and construed in accordance
with the laws of the State of California.

RIGHT OF SETOFF. Borrower grants to Lender a contractual security interest in,
and hereby assigns, conveys, delivers, pledges, and transfers to Lender all
Borrower's right, title and interest in and to, Borrower's accounts with Lender
(whether checking, savings, or some other account), including without limitation
all accounts held jointly with someone else and all accounts Borrower may open
in the future, excluding however all IRA and Keogh accounts, and all trust
accounts for which the grant of a security interest would be prohibited by law.
Borrower authorizes Lender, to the extent permitted by applicable law, to charge
or setoff all sums owing on this Note against any and all such accounts.

LINE OF CREDIT. This Note evidences a revolving line of credit. Advances under
this Note may be requested either orally or in writing by Borrower or by an
authorized person. Lender may, but need not, require that all oral requests be
confirmed in writing. All communications, instructions, or directions by
telephone or otherwise to Lender are to be directed to Lender's office shown
above. The following party or parties are authorized to request advances under
the line of credit until Lender receives from Borrower at Lender's address shown
above written notice of revocation of their authority: CHESTER S. SHIRA,
Chairman, and MICHAEL A. SPACCIALOLLI, President. Borrower agrees to be liable
for all sums either: (a) advanced in accordance with the instructions of an
authorized person or (b) credited to any of Borrower's accounts with Lender. The
unpaid principal balance owing on this Note at any time may be evidenced by
endorsements on this Note or by Lender's internal records, including daily
computer printouts. Lender will have no obligation to advance funds under this
Note if: (a) Borrower or any guarantor is in default under the terms of this
Note or any agreement that Borrower or any guarantor has with Lender, including
any agreement made in connection with the signing of this Note; (b) Borrower or
any guarantor ceases doing business or is insolvent; (c) any guarantor seeks,
claims or otherwise attempts to limit, modify or revoke such guarantor's
guarantee of this Note or any other loan with Lender; (d) Borrower has applied
funds provided pursuant to this Note for purposes other than those authorized by
Lender; or (e) Lender in good faith deems itself insecure under this Note or any
other agreement between Lender and Borrower.

GENERAL PROVISIONS. This Note is payable on demand. The inclusion of specific
default provisions or rights of Lender shall not preclude Lender's right to
declare payment of this Note on its demand. Lender may delay or forgo enforcing
any of its rights or remedies under this Note without losing them. Borrower and
any other person who signs, guarantees or endorses this Note, to the extent
allowed by law, waive any applicable statute of limitations, presentment, demand
for payment, protest and notice of dishonor. Upon any change in the terms of
this Note, and unless otherwise expressly stated in writing, no party who signs
this Note, whether as maker, guarantor, accommodation maker or endorser, shall
be released from liability. All such parties agree that Lender may renew or
extend (repeatedly and for any length of time) this loan, or release any party
or guarantor or collateral; or impair, fail to realize upon or perfect Lender's
security interest in the collateral; and take any other action deemed necessary
by Lender without the consent of or notice to anyone. All such parties also
agree that Lender may modify this loan without the consent of or notice to
anyone other than the party with whom the modification is made.
<PAGE>

PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF
THIS NOTE, INCLUDING THE VARIABLE INTEREST RATE PROVISIONS.  BORROWER AGREES TO
THE TERMS OF THE NOTE AND ACKNOWLEDGES RECEIPT OF A COMPLETED COPY 0F THE NOTE.

BORROWER:
CARBITE, INC.


By:___________________________            By:__________________________________
   CHESTER S. SHIRA, Chairman                Michael A. Spacciapolli, President


variable Rate. Line of credit.
<PAGE>

EXHIBIT 10.11

                           CHANGE IN TERMS AGREEMENT


Borrower: CARBITE, INC.                         Lender: Scripps Bank
          6330 NANCY RIDGE ROAD, SUITE 107      Corporate Lending - Kearny Mesa
          SAN DIEGO, CA 92121                   9005 Complex Drive
                                                San Diego, CA 92123

Principal Amount: $1,000,000.00                  Date of Agreement: May 12, 1999

DESCRIPTION OF EXISTING INDEBTEDNESS.

AS EVIDENCED BY:

PROMISSORY NOTE DATED OCTOBER 28, 1998 IN THE AMOUNT OF $300,000.00

CHANGE IN TERMS AGREEMENT DATED FEBRUARY 22, 1999 IN THE AMOUNT OF $540,000.00.

DESCRIPTION OF COLLATERAL.

AS DESCRIBED IN:

COMMERCIAL SECURITY AGREEMENT DATED MAY 12, 1999.

DESCRIPTION OF CHANGE IN TERMS.

1.   INCREASE NOTE AMOUNT TO $1,000,000.00
2.   LOAN AGREEMENT DATED MAY 12, 1999 SUPERCEDES ALL PRIOR LOAN AGREEMENTS
3.   CARBITE GOLF, INC. IS ADDED AS A GUARANTOR
4.   EXTEND MATURITY DATE TO MAY 15, 2000
4.   THE VARIANCE ON THIS NOTE IS DECREASED TO PRIME +1.0% OVER THE INDEX.

CONTINUING VALIDITY. Except as expressly changed by this Agreement, the terms of
the original obligation or obligations, including all agreements evidenced or
securing the obligation(s), remain unchanged and in full force and effect.
Consent by Lender to this Agreement does not waive Lender's right to strict
performance of the obligation(s) as changed, nor obligate Lender to make any
future change in terms. Nothing in this Agreement will constitute a satisfaction
of the obligation(s). It is the intention of Lender to retain as liable parties
all makers and endorsers of the original obligation(s), including accommodation
parties, unless a party is expressly released by Lender in writing. Any maker or
endorser, including accommodation makers, will not be released by virtue of this
Agreement. If any person who signed the original obligation does not sign this
Agreement below, then all persons signing below acknowledge that this Agreement
is given conditionally, based on the representation to Lender that the
non-signing party consents to the changes and provisions of this Agreement or
otherwise will not be released by it. This waiver applies not only to any
initial extension, modification or release, but also to all such subsequent
actions.

COLLATERAL. This Note is secured by UCC-1 filed November 9, 1998 as file
#9831661571, all of which also secures Note dated November 30, 1998 in the
amount of $60,000.00.

PRIOR TO SIGNING THIS AGREEMENT, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS
OF THIS AGREEMENT. BORROWER AGREES TO THE TERMS OF THE AGREEMENT AND
ACKNOWLEDGES RECEIPT OF A COMPLETED COPY 0F THE AGREEMENT.

BORROWER:
CARBITE, INC.


By:___________________________    By: ______________________________________
CHESTER S. SHIRA, Chairman            Michael A. Spacciapolli, President