This practice lock set is suitable for beginners and professionals who want to improve lock picking skills. It is also a wonderful gift for kids interested in structure and science. Features: - Package includes 8 practice locks to meet various needs. - Visible design allows you to see how the practice locks work. - Training lock helps you practice lock picking and improve skills. - Made of high-quality stainless steel, sturdy and durable. - Suitable for beginners and professionals; great gift for kids. - Each lock comes with keys to help you learn the mechanism behind the lock. Specifications: - Material: Stainless Steel + Acrylic - Package Size: 28 x 25 x 6 cm (11.0 x 9.8 x 2.4 in) - Package Weight: 712 g (1.57 lbs) Package List: - 8 x Practice Locks - 17 x Keys