The Kryptonite New York STD U Lock with Bracket uses a revamped U lock design and double dead bolt style lock to keep your bike safe from bolt cutters. The U lock uses a 16mm hardened MAX performance steel shackle to fend off leverage and the deadly jaws of bolt cutters. With the lock's double deadbolt style lock and a high security, disc style cylinder that uses a center key opening, your bike will also be protected against leverage attacks. Coated with protective vinyl, the lock won't damage your bike's paint job and a TransitFlex Frame system gives you a few carrying options whether you find yourself cruising around the big city or the burbs. One of the three steel keys even includes a high intensity light to help you find the keyhole at night.