Exhibit 99 - Additional Information

       CompX  Group, Inc. ("CGI"),     TIMET Finance Management  Company  ("TFMC")   and NL Industries,  Inc.("NL") are the  direct  holders of 49.7%,  9.3% and 0.8%,  respectively,  of theoutstanding  shares  of class A common  stock,  par value  $0.01 per share  (the"Class A Common Stock"), of the issuer.

       CGI  holds 100%, or 10,000,000shares,  of the issuer's  Class B Common  Stock,  par value $0.01 per share (the"Class B Common  Stock," and  collectively  with the Class A Common  Stock,  the"Common  Stock").  The  description  of the relative  rights of the Common Stockcontained  in the  issuer's  restated  certificate  of  incorporation  is herebyincorporated  herein by reference  to Exhibit 3.1 of the  issuer's  RegistrationStatement on Form S-1 (File No. 333-42643).  As a result of its ownership of allof the Class B Common Stock, CGI currently holds approximately 82.8% of thecombined  voting power (97.5% for the election of  directors)  of all classes ofvoting stock of the issuer.

       Titanium   Metals  Corporation     ("TIMET") is the direct holder of 100% of the  outstanding  common stock ofTFMC.  Tremont LLC ("Tremont"),  Harold C. Simmons' spouse,  The Combined MasterRetirement Trust (the "CMRT"),  Valhi, Inc.  ("Valhi") and Harold C. Simmons arethe holders of approximately  39.5%, 14.3%, 12.0%, 4.5% and 0.8%,  respectively,of the outstanding shares of common stock of TIMET. The ownership of Ms. Simmonsis based  on the  1,600,000  shares  of  TIMET's  6 3/4%  Series  A  ConvertiblePreferred  Stock,  par value  $0.01 per share  (the  "TIMET  Series A  PreferredStock"),  that she directly owns, which are convertible into 2,666,666 shares ofTIMET's common stock.  The ownership of Valhi includes  24,500 shares of TIMET'scommon  stock  that  Valhi has the right to acquire  upon  conversion  of 14,700shares  of TIMET  Series A  Preferred  Stock  that  Valhi  directly  holds.  Thepercentage  ownership  of TIMET's  common  stock held by Ms.  Simmons  and Valhiassumes the full conversion of only the shares of TIMET Series A Preferred Stockowned by her or Valhi, respectively.

       Valhi  is the direct holder of     100% of the outstanding  membership interests of Tremont. Valhi Group, Inc.("VGI"),   National  City  Lines,   Inc.   ("National"),   Contran   Corporation("Contran"),  the Harold  Simmons  Foundation  (the  "Foundation"),  the ContranDeferred Compensation Trust No. 2 (the "CDCT No. 2") and the CMRT are the directholders of 79.1%, 9.3%, 2.1%, 0.9%, 0.4% and 0.1%,  respectively,  of the commonstock of Valhi.  National,  NOA, Inc.  ("NOA") and Dixie Holding Company ("DixieHolding")  are the  direct  holders  of  approximately  73.3%,  11.4% and 15.3%,respectively,  of the outstanding  common stock of VGI.  Contran and NOA are thedirect  holders  of  approximately  85.7%  and  14.3%,   respectively,   of  theoutstanding  common  stock of National.  Contran and  Southwest  Louisiana  LandCompany,  Inc.  ("Southwest") are the direct holders of approximately  49.9% and50.1%,  respectively,  of the  outstanding  common  stock  of  NOA.  Dixie  RiceAgricultural  Corporation,  Inc.  ("Dixie Rice") is the direct holder of 100% ofthe outstanding common stock of Dixie Holding.  Contran is the holder of 100% ofthe outstanding  common stock of Dixie Rice and 88.9% of the outstanding  commonstock of Southwest.

       Substantially all of Contran'soutstanding  voting  stock is held by  trusts  established  for the  benefit  ofcertain children and grandchildren of Harold C. Simmons (the "Trusts"), of whichMr.  Simmons is the sole trustee,  or is held by Mr. Simmons or persons or otherentities related to Mr. Simmons.  As sole trustee of the Trusts, Mr. Simmons hasthe power to vote and direct the disposition of the shares of Contran stock heldby the Trusts.  Mr.  Simmons,  however,  disclaims  beneficial  ownership of anyshares of Contran stock that the Trusts hold.

       The  Foundation directly holdsapproximately  0.9%  of the  outstanding  shares  of  Valhi  common  stock.  TheFoundation is a tax-exempt foundation organized for charitable purposes.  HaroldC. Simmons is the chairman of the board of the Foundation.

       The  CDCT No. 2 directly holdsapproximately  0.4% of the  outstanding  Valhi common stock.  U.S. Bank NationalAssociation  serves as the trustee of the CDCT No. 2.  Contran  established  theCDCT No. 2 as an irrevocable  "rabbi trust" to assist Contran in meeting certaindeferred compensation obligations that it owes to Harold C. Simmons. If the CDCTNo. 2 assets are insufficient to satisfy such obligations,  Contran is obligatedto satisfy the  balance of such  obligations  as they come due.  Pursuant to theterms of the CDCT No. 2,  Contran  (i)  retains  the power to vote the shares ofValhi  common stock held  directly by the CDCT No. 2, (ii)  retains  dispositivepower over such shares and (iii) may be deemed the indirect  beneficial owner ofsuch shares.

       The    CMRT   directly   holdsapproximately  12.0% of the outstanding shares of TIMET common stock and 0.1% ofthe outstanding  shares of Valhi common stock.  Valhi  established the CMRT as atrust to permit the  collective  investment  by master  trusts that maintain theassets of certain employee benefit plans Valhi and related  companies adopt. Mr.Simmons  is the sole  trustee  of the CMRT and a member of the trust  investmentcommittee  for the CMRT.  Mr.  Simmons  is a  participant  in one or more of theemployee benefit plans that invest through the CMRT.

       NL Industries, Inc. ("NL") and     a subsidiary  of NL directly own  3,522,967  shares and  1,186,200  shares,respectively,  of Valhi common stock.  Valhi and TFMC are the direct  holders ofapproximately 83.1% and 0.5%,  respectively,  of the outstanding common stock ofNL. Pursuant to Delaware law, Valhi treats the shares of Valhi common stock thatNL and the  subsidiary of NL own as treasury  stock for voting  purposes and forthe purposes of this statement such shares are not deemed outstanding.

       Mr.  Harold C. Simmons is vice     chairman  of the board of  TIMET,  chairman  of the board of CGI,  Tremont,Valhi, VGI, National,  NOA, Dixie Holding, Dixie Rice, Southwest and Contran andchairman of the board and chief executive officer of NL.

       By  virtue of the  holding  ofthe offices,  the stock  ownership and his service as trustee,  all as describedabove, (a) Mr. Simmons may be deemed to control the entities described above and(b) Mr.  Simmons and certain of such entities may be deemed to possess  indirectbeneficial  ownership  of the shares of Class A or Class B Common Stock that aredirectly  held  by CGI  or  TFMC.  However,   Mr.  Simmons  disclaims  suchbeneficial  ownership  of  the  shares  of  Class  A or  Class  B  Common  Stockbeneficially owned, directly or indirectly, by any of such entities.

       Harold  C. Simmons'  spouse is     the direct owner of 20,000 shares of Class A Common Stock, 1,600,000 sharesof TIMET Series A Preferred Stock,  69,475 shares of NL common stock, and 43,400shares of Valhi  common  stock.  Mr.  Simmons  may be  deemed to share  indirectbeneficial  ownership  of such  securities.  Mr.  Simmons  disclaims  beneficialownership of all securities that his spouse holds directly.

     A  trust,  of which  Harold C. Simmons and     his spouse are trustees and the  beneficiaries are the grandchildren of hisspouse,  is the direct holder of 40,000 shares of the common stock of Valhi. Mr.Simmons,  as  co-trustee  of this  trust,  has the power to vote and  direct thedisposition of the shares of Valhi's  common stock the trust holds.  Mr. Simmonsdisclaims  beneficial  ownership of any shares of the issuer's common stock thatthis trust holds.