SET YOUR OWN COMBINATION: The 4-digit combination padlock takes 10 times longer to crack than a 3-digit lock. You can set your own combination with 10,000 unique options that you know are more reliable and secure. EASY TO USE: Unique side window design and large numbers make it easy to read. In addition, the ZHENGE combination padlock is equipped with an advanced damping device inside that makes each turn click into place for better accuracy and feel when adjusting the code. Only 6-step setting or resetting is easy to follow the instructions provided on the back of the package. ROBUST CONSTRUCTION: The heavy-duty outdoor number lock comes with high-strength zinc alloy bodies, hardened steel shackles and skilled craftsmanship. They are weatherproof, resistant to cutting and sawing. They are designed to be the most durable code padlocks for you. WIDE APPLICATION: The combination padlocks are perfect for both indoor and outdoor tasks such as gym lockers, school and staff lockers, cabinets, pantries, toolboxes, gate and door hasps, garages, sheds, fences and general storage. NOTE: This is a large or medium-sized number lock (1.73*0.86*3.11 inches, shackle diameter: 6 mm), not really suitable for zipper holes.