The inner chain of this bike lock is made from high-grade steel, providing excellent cut resistance and ensuring it cannot be cut by thieves. The chain is covered with dust-proof and scratch-resistant fabric, extending the lock's lifespan. Resettable 4-digit Code Lock: With 4-digit codes, the combination options reach up to 10,000, making the real password very difficult to guess. You can conveniently set and reset the numbers in just four simple steps. The bicycle lock features a 4-digit combination code, allowing for easy, keyless locking. This eliminates the worry of losing a key and being unable to open the lock. The optimised lock head material makes the bike chain lock head more durable and resistant to damage. The inner chain is made of extra-thick steel with an 8mm diameter for enhanced cut resistance. The chain lock measures 25cm x 45cm x 5cm, making it long enough to lock your bike to gates, fences, railings, thick poles, and other structures. The total weight of the lock set is 730 grams. This anti-theft bicycle lock is versatile and suitable for securing bicycles, motorcycles, scooters, iron and glass doors, skateboards, sports equipment, gates, fences, and more. It offers a cost-effective solution for property protection. Neel Blue Combination Padlock Chain, 8mm x 1.8m 4-Digit Security Chain in Black