TWISTLOCK Secure Strap Buttons
 
One piece—no moving parts to rattle, wear out, or lose.The Diago Twistlock is a simple and effective alternative to traditional ball and plunger strap lock systems. A straightforward design that works with any guitar strap.
Secured with a simple twist. Attach the strap to your guitar and give it a twist to lock it on. Your guitar won't fall off by accident, and the strap only comes off when you want it to.