Durable: The U-shaped lock is made of high-quality hardened steel, making it cut and drop-resistant. Dimensions (L x W): 20 x 12.2 cm. More secure: The mountain bike lock is equipped with a zinc alloy cylinder and an intricate serpentine key slot, making it effectively protected against various thefts. Enhanced protection: The U-shaped bicycle lock comes with a steel cable for extra protection of the front wheel or accessories. The high-quality 1.2-meter steel cable offers more flexibility in securing bicycles, motorcycles, and electric scooters. Design and performance: The silicone coating protects the bicycle lock from scratches. The waterproof bicycle lock comes with a mounting bracket, eliminating the need for additional packaging. [2 keys included] The bicycle lock set includes two pure copper keys, so you always have a spare key on hand and no longer have to worry about forgetting your combination.