Durable and Robust: This bicycle helmet lock is made of high-quality zinc alloy with a PVC coating and features spring steel cables. Its high strength, rigidity, and solid feel provide excellent resistance against cutting, prying, and clamping. The durable PVC coating effectively protects your bicycle and helmet from scratches. High Security: This child-friendly combination lock uses 2.5 high-quality steel cables in a 7x7 structure, meaning 49 steel wires are in contact with each other. The precise structural design effectively prevents breakage, and the steel gears make unlocking easier and more convenient, providing superior security. Compact and Lightweight: This ultra-light bicycle helmet lock effectively prevents accidental theft, is easy to carry, and even fits in a pocket. Customizable Combination Pattern: This motorcycle helmet lock for helmet padlocks has a combination of 000. The smart three-digit bicycle lock has a resettable combination with over 1000 possible combinations. Multiple combination options are available, and additional digits increase the difficulty of cracking. Versatile: This small combination lock can reach up to 1 meter in length and is suitable not only for bicycles, motorcycles, and strollers, but also for skateboards, suitcases, fences, toolboxes, screens, grilles, helmets, and more.