As filed with the Securities and Exchange Commission on July 19, 2006
Registration No. 333-56163
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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POST-EFFECTIVE AMENDMENT NO. 1
TO
FORM S-8
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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COMPX INTERNATIONAL INC.
(Exact name of registrant as specified in its charter)

Delaware                                           57-0981653
(State or other jurisdiction                              (I.R.S. Employer
of incorporation or                                    Identification No.)
organization)

Three Lincoln Centre
5430 LBJ Freeway, Suite 1700
Dallas, Texas                                          75240-2697
(Address of principal                                      (Zip Code)
executive offices)

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COMPX CONTRIBUTORY RETIREMENT PLAN
(Full title of the plan)

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A. Andrew R. Louis, Esq.
Three Lincoln Centre
5430 LBJ Freeway, Suite 1700
Dallas, Texas 75240-2697
(972) 233-1700
(Name, address and telephone number
including area code of agent for service)

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DEREGISTRATION

On December 31, 2005 the CompX Contributory Retirement Plan, formerly known
as the National Cabinet Lock, Inc.  Contributory  Retirement  Plan,  merged into
another retirement plan, with the other plan surviving the merger. The surviving
plan no longer offered to participants  the option to purchase or sell shares of
class A common stock, par value $0.01 per share ("Class A Common Stock"), of the
registrant. Any shares of Class A Common Stock held by a participant of the plan
were sold  prior to  December  31,  2005.  Accordingly,  the  registrant  hereby
deregisters  all unsold  shares of the  500,000  shares of Class A Common  Stock
initially registered under this registration statement.

SIGNATURES

Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds  to  believe  that it meets  all the
requirements  for  filing  on Form S-8 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the city of Dallas, Texas, on July 19, 2006:

COMPX INTERNATIONAL INC.

By: /s/ A. Andrew R. Louis
---------------------------
A. Andrew R. Louis
Secretary

Pursuant to the  requirements  of the Securities  Act, this  Post-Effective
Amendment No. 1 to the  Registration  Statement has been signed by the following
persons in the capacities and on the dates indicated:

Signature                         Title                      Date
---------------------------        ---------------------         -------------

*                                  Chairman of the Board         July 19, 2006
---------------------------
Glenn R. Simmons

*                                 Vice Chairman of the           July 19, 2006
---------------------------       Board, President and 
David A. Bowers                   Chief Executive 
Officer (Principal 
Executive Officer)

/s/ Darryl R. Halbert             Vice President, Chief          July 19, 2006
---------------------------       Financial Officer and 
Darryl R. Halbert                 Controller (Principal 
Financial and 
Accounting Officer)

Signature                         Title                      Date
---------------------------        ---------------------         -------------

*                                 Director                       July 19, 2006
---------------------------
Paul M. Bass, Jr.

*                                 Director                       July 19, 2006
---------------------------
Edward J. Hardin

*By:     /s/ A. Andrew R. Louis
----------------------
A. Andrew R. Louis
Attorney-in-Fact

Pursuant to the  requirements  of the Securities Act, the plan committee of
The  CompX  Contributory  Retirement  Plan has  duly  caused  this  registration
statement  to be  signed  on  its  behalf  by  the  undersigned  thereunto  duly
authorized, in the city of Dallas, state of Texas, on July 19, 2006.

The CompX Contributory 
Retirement Plan

By: CompX International Inc. 
as the sponsor of The 
CompX Contributory
Retirement Plan

/s/ Darryl R. Halbert
-----------------------
Darryl R. Halbert Vice 
President, Chief 
Financial Officer and
Controller