"If you are looking to learn to crack combination locks, you might be displeased to find out that its extremely difficult. It often requires a lot of experience and the intimate knowledge of lock fundamentals in the first place. There are lock smiths that have been doing the job for 25 years that still don't have the techniques learned that would make it possible for them to be able to crack the
. inner code of a combination lock. Often times in movies we would see a simple stethoscope listing to the pins working in side but its is much more difficult than that. You can find more information here: http://www.wikihow.com/Crack-a-%22Master-Lock%22-Combination-Lock"
