SMITH & WESSON MODEL 100 QUICK PICK HANDCUFFS 

This gaffed handcuff TRULY locks onto your (or a spectator’s) wrists. It can only be taken off two ways: with the key, or INSTANTLY with a STRAIGHT lock pick (or even a safety pin, etc) BY ACCESSING THE DOUBLE-LOCK OVAL HOLE! It truly only takes one second per cuff. So, you can do FULL VIEW picking, or if you wish, have the key hole taped over (since you aren’t going to use the key hole anyway!)

Here’s another idea: Have yourself cuffed “spread-eagle” to a board. With a little bit of practice, (and a strategically placed, small nail head protruding from the board), YOU USE THE NAIL HEAD TO UNLOCK THE CUFF!