Description: 4-digit offers 10000 combinations, which is much more difficult to crack. Durable structure of zinc alloy and plated steel, Anti Rust, Weather-proof, compact design; make it your lock set. Easy to use, Numbers are easy to read, maneuver, set and reset to your own personal code. Padlocks are design for indoor and outdoor use, for most light-duty tasks such as Gym/Sports, school and employee lockers, cabinets, cases, hasps and general storage. Specifications: Material: zinc alloy Color: black+black, black+silver Size: height: about 79mm, width: about 43mm, thickness: about 21mm, lock hook diameter: about 6mm How to set new password: 1. Set the code to default(0-0-0-0) then pull up the shackle. 2. Rotate the shackle 90 degree right to the lock Code Setting Gaps(there is a small bump and groove inside the root of the lock). 3. Push the shackle down until the tiny pin is all the way inside the gaps. 4. Rotate the shackle 90degree right to the Code Line. 5. Scroll the numbers to set your own code(Be sure that the number is well aligned with the scale line). 6. Rotate back the shackle to the Code Setting Gaps until it pops up. Your new password is changed. Package Included: 2PCS X 4 Digit Anti Rust Padlock"