I think the key is similar to those used for footlockers (the ones that don't use an actual key anyway). When I was younger I had a few small safes that used keys like that, and I would always loose the keys then just pick the locks with a paperclip...lol
Andy "Ydna" DuBuc
As told by Stobaeus
...someone who had begun to learn geometry with Euclid, when he had learnt the first theorem, asked Euclid "What shall I get by learning these things?" Euclid called his slave and said "Give him threepence since he must make gain out of what he learns".