Built to defeat both bolt cutter and leverage attacks, the Kryptonite KryptoLok U Lock provides a high level of security for your bike while the included 4 ft. flex cable also protects your front wheel or accessories. 13 mm hardened Performance steel shackle resists cutting and leverage attacks. Includes 4 ft. KryptoFlex double loop cable for securing front wheel or accessories. Reinforced hardened cross bar design provides increased protection. High security, disc style cylinder. Anti rattle bumpers reduce noise during transport. Protective vinyl coating rotating dustcover protects and extends cylinder life. Transit FlexFrame U transportation system allows for versatile carrying. Includes 2 stainless steel keys. U Lock dimensions: 9 x 4 in.. Weight: 3.6 lb.