About this item [Shackle Size]: Shackle Diameter: 4mm / 0.16"; Shackle Inner Size: 12 x 21mm / 0.47" x 0.83" (W*H) [Durable Material]: Constructed with zinc alloy, lightweight, portable, waterproof, weather resistant, anti rust and has a long service life [4-Dial Combination]: You can set and reset the combination padlock with hundreds of possible combinations, making it harder to crack. [Mutiple Usage]: Its design great for indoor and outdoor use. It can be used for Gym, and fence, toolbox, cases, chests, cabinets and anywhere you want. [How to Reset]: 1.Open lock with current password 0000; 2.Rotate shackle 90 counter-clockwise; 3.Press down and hold shackle; 4.Set a new combination; 5.Return shackle to locked position(Please remember the code you have set.) › See more product details