Bicycle Chain Locks - Complete Security Kits - Each kit includes a high-quality, heavy-duty forged one-piece lock, three keys, and a 100cm high security chain. Professional operators choose chain and lock kits every year to protect millions of valuable pieces of equipment, including trailers, motorcycles, bicycles, and ATVs, and can work with confidence. Almost no damage or cuts - The hardened surface of the chain cannot be manually cut with bolt cutters, and the lock features the maximum security protection mechanism to provide ultimate protection. The square shape of the chain prevents bolt cutters from gaining a good grip, and the lock is specially designed to make it almost impossible to pick with anti-theft tools. If you don't have a key, you actually need an acetylene torch to break the chain and lock. Scratch-resistant cover and user-friendly size: The chain lock is wrapped with a waterproof nylon sleeve, which is scratch-resistant and wear-resistant, which can prevent the