My play collar is made similarly to the cuffs that Oz showed and has a loop for the lock. When the lock isn't used it works just fine. I had assumed that Master always locked it and was surprised one day to find that he hadn't. I didn't know this of coarse until I knelt before him to have him unlock it and he kind of laughed. *grumbles* damn mind tricks!The point is that you probably won't even be able to tell the difference. Good luck!