12mm Hardened steel shackle a New hardened deadbolt anti-rotation design a Includes 2 stainless steel keys, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking a Includes side mount, snap-in bracket a Disc style cylinder with center keyway a Protective vinyl coating a Key Safe Program a Product dimensions: 4" x 8" (10.2cm x 20.3cm) a Product weight: 2.05 lbs SPECIFICATIONS a 14mm hardened &';MAX-Performance&'; steel shackle resists cutting and leverage attacks a Double dead bolt locking mechanism for extensive holding power a Reinforced anti-drill/pull cylinder protection system a Enhanced engineering resists twist attacks a Center key location and overhead cam locking mechanism resists leverage attacks a Improved sliding dust cover protects cylinder a Protective vinyl coating a Includes FlexFrame U-Bracket a Sizes: 10.2cm x 20.3cm, 10.2cm x 29.2cm, 8.3cm x 15.2cm"