【Hidden Password and Error Prevention】 The password is located at the bottom of the lock and is hidden. To change the password, you need to unscrew the screw and push the setting key up until you see the "SET" key, then reset the password. This can effectively avoid the problem of unable to open the password due to inadvertent password change. 【One Key Unlock Function】The original password of the lock is 0-0-0-0. After adjusting the password, press the middle button to open the lock, which is very convenient to use. Note : Please take a photo to record the new password when changing the password, to avoid unable to open. 【Strong Performance in Security】Lock body in One-piece alloy, 304 stainless steel lock hook, 8mm anti-pick shackle, cannot be manually pulled out or cracked, and can effectively prevent shearing and picking. The 4-digit metal password wheel has 10000 password combinations, which can achieve a high level of anti-theft. 【Unique Appearance Design】The square shell design is simple and elegant; The surface of the lock has a non-slip texture, which gives it a very good feeling. Only 270g, small size, easy to carry. 【Wide Range Of Uses】It is suitable for indoor and outdoor places, such as doors, fences, garages, tool boxes, lockers school buildings, gym lockers, etc. It is a good choice for personal use and gift. If you have any questions about our products, do not hesitate to !