Generic 7 Pins Tubular Lock Professional Cutaway Inside view of Practice Keyed Padlock Training Skill for Locksmith The Clear Lock is a Great Way of Helping People Really Understand What's Going on Inside. It was Also Like a Puzzle or Game, a Fun Hobby to Learn and Would Even Make a Great Gift for That Person You Can Never Think of What to Get Them. You Won't be Disappointed in This Lock Set and We Look Forward to All the Great Family Time You Enjoy with This Set. Materials are High Grade and Robust. Works Fine and Looks Really Pretty, A Friendly Customer Support Stand Behind Their Items. The Housing of This Teaching Aid is Made of Clear Plastic, and was Designed for Training Use to Help Beginners Learn to Open Tubular Locks by Manipulation.