Kryptonite Series 4 Evolution U-Locks feature a 14mm, hardened MAX-Performance steel shackle with a double deadbolt design.14mm, hardened MAX-Performance steel shackle with double deadbolt designHigh security disc-style cylinder with more than a million key variations, 2 standard and 1 lighted keyReinforced anti-drill/pull cylinder with center key location and overhead cam locking mechanism$2,250 anti-theft protectionItem SpecificationsLock Size4" x 9"Bracket Incudedyes