This set is very suitable for beginners who wanna imporve the skills of lock picking and who always lose his keys. Of course, it is a ideal gift for kids who are interested in structure and science. Three different kinds of locks are included, give you the option of practicing on different types of locks.(optional) Features: 15pcs pick set with one training lock are included, all-in-one set contains all the tools you need.（optional） Padlock with transparent structure will help you better to learn the mechanism behind the locks. The picks are made of stainless steel and the lock is made of acrylic, durable and sturdy for long time use. Carrying bag is included for easy storage. Ideal for the beginners and professionals. Specifications: Two types :Type 1,Type 2,Type 3 Material: Stainless steel(picks)& Acrylic(padlock) Type 1 Package Size: 8.5 * 5.5cm / 3.4 * 2.2in Type 1 Package Weight: 30g / 1.1oz Type 2 Package Size: 14 * 7.5 * 2cm / 5.5 * 3.0 * 0.8in Type 2 Package Weight: 137g / 4.8oz Type 3 Package Size: 28 * 20 * 8cm / 11.0 * 7.9 * 3.1in Type 3 Package Weight: 380g / 13.4oz Type 1 Package List: 5 * Lock Picking Tool 1 * Card Package Type 2 Package List: 15 * Lock Picking Tool 1 * Storage Bag Type 3 Package List: 3 * Padlock 6 * Keys 1 * Storage Bag 15 * Picks