Kryptonite New York - 5'6" Chain and Lock.

10mm four-sided chain links made of triple heat-treated boron manganese steel for maximum strength Narrow inner width of individual links defends against leverage attacks Durable, protective nylon cover Includes Evolution series 4 Disc Lock with 14mm MAX-Performance steel shackle Double deadbolt locking mechanism for extensive holding power New, higher security disc-style cylinder with more than 1 million key variations Reinforced anti-drill/pull cylinder protection system Sliding dustcover protects and extends cylinder life 3 keys - one lighted with high intensity bulb & replaceable battery