The Kryptonite New York Lock Long Shackle has a 16mm hardened MAX-Performance steel shackle that resists bolt cutters and leverage attacks. A patented hardened steel sleeve is positioned over the crossbar for double security. As well, there is a hardened double deadbolt design, providing extensive holding power and extra protection against twist attacks. Pick and drill resistance is enhanced by a higher security disc-style cylinder. The centre keyway also defends against leverage attacks. Kryptonite includes 3 stainless steel keys with a new key design, including one lighted with high intensity led bulb & replaceable battery. There is even a key safe program. Protective vinyl coatings cover the parts of the package include a sliding dustcover that protects and extends cylinder life Key Features16mm hardened max-performance steel shackle resists bolt cutters and leverage attacks Patented hardened steel sleeve over the crossbar for double security Double deadbolt locking for extensive holding power High security disc-style cylinder Centre keyway defends against leverage attacks About KryptoniteOver 40 years ago, Kryptonite began with a mission. While much has changed in bicycling, and bicycle security, Kryptonite\\\'s objective remains the same, they are here to empower you to protect what you value. Through constant innovation, expert guidance, and Kryptonite\\\'s never-ending commitment, they continue to pursue their passion and do everything they can to ensure you can go where you want, when you want by offering smart, serious security solutions. In 1989, an unusually high number of Anti-Theft Protection claims in central New York City, forced Kryptonite to stop offering protection there until 1994. The New York Lock was introduced in 1994 and became a flagship lock for the company. By 2013 Kryptonite became part of Allegion PLC through the spinoff of Allegion from Ingersoll-Rand. This separation allows Allegion to focus solely on commercial and residential security businesses. Bicycle Locks Buying Guide