Get big city tough with Kryptonite's New York Lock. A 16mm hardened steel shackle scoffs at bolt cutters and leverage attacks, deterring even the most determined bike thieves. The shackle is held in place with a hardened deadbolt locking mechanism for exceptional holding power, while the hardened steel sleeve over the crossbar adds even more toughness. When you're ready to get back in the saddle, unlock this mean guard using one of the three included keys. For nighttime unlocking, the key with an LED light makes the process even easier. And, with a $3000 anti-theft protection free for one year, rest assured knowing your bike is guarded on the toughest streets.