Professional Cutaway Inside View of Practice Padlocks Training for Locksmith with 3 Keys (Sliver) Overall Size: 78mm x 50mm Package includes: 1 cutway padlock & 3 key Lock with open chambers on all the moving parts that allow you to see how it work. You actually can see the pins moving up and down as the key slides into and out of the lock. Knowed more about the lock how to work.