Those are warded locks, master keys (nothing to do with the Master Lock company) are keys which can open a large group of locks in a specially prepared locking system.

Long, long ago we covered a method to crack a Master lock in about 30 minutes or less. Here’s a revival of the same method but now the instructions to retrieve the combination are in info-gra… ...

How to Make Fully Functional Lock from Cardboard Today I show you how to make fully functional lock model. This lock can be ...

Three hackers have developed and released a 3D printable master key used by Transportation Security Administration, which opens Safe Skies luggage locks. During a talk given on Saturday, the three ...