This Kryptonite New York Chain 1210 is a top - notch security solution. The 12mm six - sided chain links crafted from 3T Hardened Manganese Steel offer maximum strength. It comes with a durable, protective nylon cover held in place by hook - n - loop fasteners. Included is an Evolution series 4 Disc Lock with a 14mm Max - performance Steel Shackle. The patented, oval hardened Steel Crossbar adds extra security. The hardened Double Deadbolt locking provides extensive holding power. The high - security disc - style cylinder has a reinforced anti - drill, anti - pull protection system. A sliding dustcover protects and extends the cylinder life. You'll get 3 Stainless Steel Keys, one with a high - intensity bulb and a replaceable battery, and there's a Key Safe Program. The chain is 100cm (3.25’) long with a 14mm shackle diameter and weighs 3.92 kg (8.65 lbs).

Using the Kryptonite New York Chain 1210 is easy. First, wrap the chain around the object you want to secure, like your bike frame and a bike rack. Then, insert the shackle of the disc lock through the chain links and lock it. Make sure the lock is firmly in place. When it comes to the keys, use the lighted key at night for easy access. Remember to keep the spare keys in a safe place as part of the Key Safe Program. For maintenance, regularly check the nylon cover for any signs of wear and tear. If it gets dirty, you can clean it with a mild soap and water. Also, keep the cylinder and keys clean and dry. Avoid exposing the lock to extreme temperatures or harsh chemicals, as this can damage the components and reduce the lock's effectiveness.