3 Digit Combination Lock. Metal material, Anti-, . How to change the password: There is a password change hole at the bottom of the lock. Use a small stick to top this hole in the open state, do not release it, and then change the password. Release your hand when you are done, and the password change is complete. You can change the password by yourself on the lock, change the password one by one, don't change three numbers at once. Remember the password, the wrong password not be to unlock., Manufacturer: Akfldms