?Transparent design， when the pins moving up and down as the key slides into and out of the lock，you can see clearly how the lock works?It comes out in perfect smooth working condition with no loose parts or pins?Lock with open chambers on all the moving parts that You can see clearly that how the pins work when a key is inserted?Design for learning lock picking，excellent teaching & training tool for beginners?Package includes: 1 Clear Practice Padlock + 2 keys + 12 Pc Lock Pick Set