This heavy-duty bicycle lock is a lock hook made of hardened performance steel, which can resist cutting, sawing and scraping, thus extending the life of the lock. This heavy-duty bicycle lock is a lock hook made of hardened performance steel, which can resist cutting, sawing and scraping, thus extending the life of the lock. The combination bicycle lock is equipped with a 16mm/0.63-inch U-lock and a 14mm/0.39-inch diameter 1.2m/4-foot long extremely durable braided steel cable to provide double security. Suitable for s, motorcycles, gates and fences, etc. The bicycle U-lock is equipped with 2 rust-proof coppers. One can be used in life, and the other can be left at home to prevent loss. The bicycle U-lock is equipped with 2 rust-proof coppers. One can be used in life, and the other can be left at home to prevent loss. The lock cylinder of the bicycle lock is made of pure copper blades, with a precise structure to prevent technical opening, effectively resisting violent picking. The dust cover effectively prevents corrosion from rain and debris, extending the life of the lock. Equipped with a mounting bracket, which can be fixed and removed. You can refer to our instructions for installation. Equipped with a mounting bracket, which can be fixed and removed. You can refer to our instructions for installation.