Using your ULAC Soloist Pro U - Lock is a breeze. First, set your own unique combination on the resettable mechanism. To lock, open the shackle and place it around the object you want to secure, then close it. To unlock, simply enter your pre - set combination. When it comes to maintenance, keep the lock clean and dry. Avoid exposing it to extreme temperatures or harsh chemicals. If the combination mechanism seems stiff, you can use a small amount of graphite powder to lubricate it. Also, don't forget that you can change the combination whenever you like for added security. Make sure to remember your new combination and keep it in a safe place.