【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 adjustment key up until you see the "SET" key, and then reset the password. This can effectively avoid the problem of being unable to open the password due to inadvertent password change. 【Strong Security Performance】One-piece alloy lock body, 304 stainless steel lock hook, 8mm anti-pick shackle, cannot be manually removed or cracked, and can effectively prevent shearing and searching. The 4-digit metal password wheel has 10,000 password combinations, which can achieve a high level of anti-theft. 【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, so as to avoid being unable to open it. 【Unique Appearance Design】The