Security - Kryptonite New York LS U-Lock, 4x10.25, Black/YellowThis lock is the highest security Kryptonite U lock available, featuring a 16mm hardened MAX Performance steel shackle with double deadbolt design. 16mm hardened max performance steel shackle Hardened double deadbolt locking for extensive holding power Patented STEEL SLEEVE over cross bar for double security Highest security disc style cylinder is pick and drill resistant Includes three stainless steel keys two standard "I" keys and one LED lighted