combination locks

[saymakhan]

How do these work? The reason I ask is because I have forgotten the combiantion to a briefcase I was given for my graduation. The time has come to start using it but I can't for the life of me remember what combination I set it to, I have the keys but don't want to break into it if it can be avoided. Any advice?

[yuprules]

Maybe this will help: http://www.howstuffworks.com/inside-lock.htm