this is NOT how you get out of cuffs. these are "movie cuffs" with zero security for the key hole. real cuffs do not work like this. so in case you are curious, the way to get out of the real thing is to find a paper clip or very thin hair clip and jam a thin long part of it into the teeth and push it in(tightening them). this will push the locking teeth out and disengage with the teeth on the hinge, allowing you to pull the hinge out.