Crystal Professional Transparent Cutaway of Padlocks Lock for Locksmith Lock Training Trainer with 2 keys by Lock-Guru - Good for Beginners Package includes: 1 x Padlock, 2 x keys ; Size: 78mm x 50mm You can clearly see how the lock works It will come out in perfect smooth working condition with no loose parts or pins Best Padlocks Lock Training Trainer Skill for Locksmiths Lock with open chambers on all the moving parts that allow you to see how it work