I bought two sets and find it useful. It's true that if you put a half dollar or a silver dolar and
want to hold coins there while you go shopping and don't plan to use it you could lose the coin. It
could unlock. But if you place the coins there before the performance you're safe. One review said
he'd rather do slight of hand and that's fine but if you want to show your hands empty. This is the
way. You can also place it at the bottom of your jacket and retrieve a coin as you relax arms at
your side. I love it!