keychain linker

The keychain linker, for lack of a better term, is a nifty device. Essentially, it is a cylinder which joins two keychains together. The beauty of it is that it also allows the chains to be unlinked and relinked with ease. A rough, ASCII art sketch:

------------------------------------------------------------
  <Connected>

   Male Half                        Female Half
 ________________________________  _______________________
|                                ||                       |
                  __              
                 |  \____________ D______________ _  F  __
 _  C  _         |  |            ||++++++++++++++| \___/  |
| \___/ |________|  |            ||++++++++++++++|        |
|       |        |  |            ||++++++++++++++|        |
|       A        |  B            ||++++++E+++++++|   G    |
|  ___  |________|  |            ||++++++++++++++|        |
|_/   \_|        |  |            ||++++++++++++++|  ___   |
    C            |  |____________||______________|_/   \__|
                 |__/             D                  F
                      <----            ---->

--------------------------------------------------------------

  <Male Half, separated>
              __ 
             |  \____________ D   I
 _  C  _     |  |            |___/\____    
| \___/ |____|  |            |         |__
|       |    |  |            |         |  \
|       A    |  B            |   H     |   > J  ---->
|  ___  |____|  |            |         |__/
|_/   \_|    |  |            |_________|    
    C        |  |____________|   \/
   ---->     |__/             D   I      

                   XXXXXXX     XXXXXXX        
                   (no motion) (no motion)   
------------------------------------------------------------

NOTE: Not to scale.  *That*'d be *real* art.  :)

1. A cylinder which, when pressed, detaches the male and female ends. It is actually a shaft running through B and H. J is a continuation of A.
2. A metal cylinder which houses the detaching mechanism.
3. A hole running through A. The keyring runs through here.
4. The area of detachment.
5. A metal cylinder similar to B, but with a company logo and plastic cover. This cover becomes worn very quickly. Then it is no longer so transparent.
6. A hole running through G, similar to C. The second keyring goes through here.
7. A continuation of the metal under the logo (E). This part doesn't actually do anything but have a hole running through it.
8. This is a small metal cylinder which slides up into the female half. It is a continuation of B. B and H probably contain a spring and the A-J shaft.
9. A ball which is retracted upon depressing A.
10. A small metal part which protrudes upon depressing A (while A is extended, it is completely inside of B-H). It is actually a continuation of A. Together, they form the A-J shaft, running though B and H.

To detach the two keyrings (one attached to each end of the keychain linker), you depress A. This retracts the small balls (I) and pushes out J. This serves to both detach and push apart the halves.
To reattach the keyrings, simply push H back into the E-G cylinder. It snaps back in place as the balls (I) fall into a groove inside of E-G.

Source: my keychain