1. Security: The bike cable lock with 4-digit combination which has 10000 kinds of arrangement, you can reset your own password and no one can know it except yourself. The initial password is 0000, turn the knob 90 degrees in a clockwise direction and then set your combination you desire. 2. Convenience: No need for keys when locking, and you will never be afraid of forgetting taking keys. You can use the cable lock to lock your bike quickly and unlock it easily whenever and wherever as long as you want. It is a good bicycle accessories for your bike. 3. Protective: Silicone protective outer layer can avoid scratches on your bike. Besides, the bike lock with combinations is also a good choice for bikes and folding bikes, preventing children from being injured by cable locks. 4. Lightness: The bike lock cable is 1.83 feet long and it only weighs just 0.43 pounds, which is more convenient to use and carry up. If you want to go outdoors with your bicycle, this cable lock won't be your burden.