The Kryptolok features a Center Key locking design and a high security pick and drill resistant disc-style cylinder.Center Key Locking mechanism for better security, includes EZ mount carrying bracketHigh security pick and drill resistant disc-style cylinderPatented bent-foot design makes lock-up easy, patented cam resists attacks by pry bars and hammersOptional $1250 anti-theft protection offerItem SpecificationsLock Size4" x 8"Bracket Incudedyes