1. Made of quality carbon steel, this lock has anticutting, antisawing and antiprying performance. Its sturdy design ensures outstanding security and effective antitheft protection. The complex zinc alloy lock core is paired with a snakeshaped groove copper key, making it difficult to open after locking, further enhancing the antitheft ability and protecting your property safety. 2. **Waterproof and dustproof**: The outside of the bicycle Ulock is wrapped with a durable protective material, effectively waterproof, dustproof and scratchresistant. This design prevents rainwater from seeping in and protects the lock core from rusting. In addition, the protective layer helps maintain the integrity of the lock during use, extends its service life, and avoids scratching your bicycle. 3. **Heavyduty structure**: This Ulock is made of performance hardened steel, resistant to cutting and lever attacks. 4. **Advanced lock core mechanism**: The mountain bike lock is equipped with a zinc alloy lock core with a clever snakeshaped wedge groove, effectively preventing technical unlocking and providing additional security.