Masterlocks are locks that are generally rented to the students for the school year. It is a combination lock on the front, and each has a different combination that is given to the student with the lock.

On the back of these locks is a small keyhole. This keyhole can be easily mastered once you have one. Also on the back of these locks as a number that has been imprinted on by Masterlock, Inc. at the factory.

You are going to learn two different ways to crack the master locks and create your own master key in this easy to follow manual.