Cap-Locks.

Step 3 Remove Your Strap Buttons, and Drill a Hole In the Bottle Caps.

Remove your strap buttons with a screwdriver, and then set them, along with screws, aside. Hook your strap to the strap buttons before you do anything else, and then take a drill bit slightly smaller than your screws for your strap buttons and drill a hole in the center of your bottle caps. Afterwards, you will need to take your screws and wear the hole in the cap to where it will easily rotate around the screw.

If your strap buttons have short screws, you may want to dent in the bottle cap to where it will fit the strap buttons better.

After this has been done, go to the next step where you will assemble the Cap-Locks.