3 Pieces Transparent Practice Lock Set with Black Cover, Practice Tools for Beginner and Pro Locksmith
Transparent Practice Locks: useful for locksmith to train and practice, help you know the mechanism of the locks.
Perfect For Beginners: You can see clearly how the lock works, and instruction to introduce the mechanism of several types of lock.
Nice Toy For Kids: Lock with open chambers on all the moving parts that allow you to see how it work. It's nice to improve their intelligence and practical ability and great gift for your geek friends.
3 Styles of Locks: help you improve your lock picking skills after a short time of learning and practicing. And they will come out in perfect smooth working condition with no loose parts or pins.