1. A3 iron lock body: Featuring a lock body constructed from A3 iron, our U shackle lock delivers robust theft protection and resistance against shearing. Rigorously tested for shock resistance and strength, it ensures unparalleled security against theft. 2. PVC coating: This bicycle lock is crafted from hardened steel and coated with a protective PVC layer, which not only safeguards your bike from scratches but also resists water, oil, dust, and other environmental hazards. 3. Easy installation: No need to worry about your bike's safety outdoors. With the included portable holder, accessing your lock is effortless, and it can be conveniently mounted on your bike. It ensures your security is always within reach, no matter where you go. 4. Enhanced security system: Equipped with double anti lever technology, this bicycle lock guarantees tier protection. The specially treated core and locking pins increase unlocking difficulty, shielding your bike from theft and providing you with complete peace of mind.