Crafted from triple heat treated boron and manganese steel the kryptonite new york legend chain and padlock is one of the most secure bike chains on the market this chain lock is versatile and easy to use but is laden with the latest technological advances in bike security the design of both lock and chain render the lock impervious to bolt cutters hammers and chisels as well as leverage attacks the kryptonite new york legend chain and padlock is protected by a nylon covering preserving