Firm: anti cutting and anti lever. The silicone cover makes the U-shaped lock resist the corrosion of dust and dirt and prolong the service life of bicycle lock. Non blocking: the lock cylinder of u lock is made of imported pure copper blade, with accurate structure to prevent technical opening. With lock dust cover and copper lock cylinder, there is no need to worry about blocking when opening the bicycle lock. Easy installation: the mounting bracket is easy to install. You can refer to our instructions for installation. This convenient installation allows you to quickly store the bicycle lock while riding. Enjoy an unprecedented beautiful day! Wide application: in addition to locking bicycles, the lock can also be used for electric bicycles, motorcycles, skateboards, strollers, ladders, fences, barbecue racks, lawn mowers, office doors, store doors and sports equipment. According to the distance of the parking position, decide to use the bicycle U-lock alone or together with the auxiliary cable to make your property safer.