MULTIPLE USAGE - It can be widely used indoor and outdoor. 0.16 inches of shackle diameter, It can thread through all standard sized zippers and lock holes on the market. Universally suitable for gate, gym locker, suitcase, case, backpack, laptop bag and etc. UNBREAKABLE, UNCUTTABLE AND WATERPROOF - All metal-made construction! Lock body is made of aluminum alloy and the lock beam is made of stainless steel for superior cut resistance, and . Solid metal code wheel offering extra resistance to cutting and sawing. Moreover, the premium material is waterproof and anti-rust, making it very good for outdoor use. 4- COMBINATION - 4-digit offers 10, 000 combinations, it is 10 times harder to crack than a 3-digit, providing 10 times more security for your locker/luggage/valuables. With lock, you don't have to worry about anything when you go out, this hevy duty lock keep your possessions always secure. EASY TO USE - No keys Resetting your own combination is simple and straight forward. You can follow the instructions to Numbers on combination lock are easy to read and dials are easy to turn, making locking and unlocking in seconds., Manufacturer: Akfldms