HEAVY DUTY SAFE ANTI THEFT: ROCKBROS bike u lock with cable is made of great quality steel and subjected to high temperature vacuum heat treatment, difficult to cut even with ordinary pliers. About max 22mm diameter, 1.76lbs/0.8kg heavy duty bike u lock guarantees anti theft and durable performance. HIGH QUALITY U LOCK: High level lock core adopts precise structure and unique key to prevent technical opening. With the lock dust cover and high quality lock cylinder, bike u lock has long servicing time. Heavy duty anti theft bike u lock with cable adds to safe confidence during daily use. 1.2M/4Ft Steel Cable: This bike u lock comes with a 1.2M/4Ft double looped end steel cable. If need more space, you can tie the bike to fence or post with the long steel cable. Steel cable is strong but also very flexible so you can wrap it as you need. MOUNTING BRACKET: The bike u lock size: 8.27*4.33inches/21*11cm. A mounting bracket can fasten the U bike lock and take it away at easily, convenient to carry and store. No worry about riding without taking your bike lock. STURDY & DURABLE: The heavy duty bike lock is solid and reliable, covered with a heavy silicone material that keeps from scratching your bike, more solid for daily use, fits for road bikes, mountain bikes, electric bikes, city bikes, gates and fences, etc.