The Kryptonite Kyptolok Mini-7 D Lock has a more secure 12.7mm hardened steel shackle that resists cutting and leverage attacks. For added security, the Kyptolok Mini-7 D Lock, has CNC precision machined shackle tips, scoop and bump technology, as well as anti-rotation crescent shackle tips. The Transit FlexFrame-U transportation system allows you to attach the lock to your bike in a variety of ways. Protection against the elements is provided by a vinyl coating and a dust cover for storage. The package includes 2 stainless steel keys to ensure you have a spare, plus a key safe program. Key Features12.7mm hardened performance steel shackle New patent-pending hardened double deadbolt design gives additional protection against twist attacks High security disc-style cylinder is pick and drill resistant Includes 2 stainless steel keys, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking Includes FlexFrame-U bracket providing convenient multi-location u-lock transport 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