High Security Bike Lock: Our bike helmet lock is made of high quality stainless steel and nylon, which is reliable, strong and not easy to rust. Unique Cable Tie Design: Adopted a clamp design -cable, this helmet lock can be adjusted freely to meet different anti-theft needs as well as be opened and closed easily. 3-Digit Password:With the 3-digit code, the bike lock has excellent anti-theft performance. Don't worry that you can't open the lock because of the lost key. Wide Applications: the padlock is suitable for bicycles, helmets, luggage box and other outdoor uses, it can also be used for cabinets, windows and doors, etc. High Strength Cylinder: The lock cylinder is made of zinc alloy, so the bike lock provides excellent protection against theft