Using the Ulac Type - AX folding lock is easy. First, use the multipurpose mounting bracket to attach the lock to your bike's frame or a bottle cage. When you want to lock your bike, simply extend the blade and use the push - to - lock cylinder to secure it. Remember to always keep the anti - dust lid on the cylinder to prevent dirt and debris from getting in. For carrying, you can use the transportation bracket system on the seat post, frame, or water bottle cage. When it comes to maintenance, occasionally clean the blade and the cylinder with a dry cloth. If you encounter any issues with the lock not locking or unlocking properly, check the dimple keys to make sure they are not damaged. Keep the keys in a safe place, as there are 500 unique key combinations and replacement might be a bit tricky.