We interrupt this program for a special public service announcement...

Got a MasterLock? Did you forget the combination?

A co-worker of mine forgot the combination to his MasterLock combination lock. He found this site, and was able to crack his own combination. It's really interesting the way this works. Looks like the varying combinations MasterLocks have are physically dependent on their mechanical makeup. This means you're never going to get the 64,000 (40*40*40) possible combinations you would intuitively think there were in a 40-number combination lock. Through a process of elimination detailed on this site, you will be able to reduce the possible combinations of your lock to a maximum of 100. Try it out!

Bottom Line: Use the combination locks to keep your crap safe in a locker room or anyplace else where your stuff will be protected for a small amount of time, but use standard key locks everywhere else. A determined cracker can break your lock in about 30 minutes.