This visible padlock is suitable for beginners and professionals who want to improve lock picking skills and who always lose his keys. It,s also a wonderful gift for kids who are interested in structure and science. Features: Visible design, allows you to see how the padlock works. Training lock helps you practice lock picking and improve skills. Made of high quality stainless steel, sturdy and durable to use. Comes with 2 keys, helps you learn the mechanism behind the lock. Suitable for beginners and professionals, wonderful gifts for kids. Specifications: Material: Stainless Steel + Acrylic Item Size: Approx. 8 * 5 * 1.5cm / 3.1 * 2.0 * 0.6in Item Weight: 105g / 3.7oz Package Size: 13 * 10.5 * 2cm / 5.1 * 4.1 * 0.8in Package Weight: 123g / 4.3oz Package List: 1 * Transparent Padlock 2 * Key