14 mm hardened MAX Performance steel shackle resists bolt cutters and leverage attacks; Patented, hardened reinforced oval crossbar design is stronger than a typical round tube; Hardened double deadbolt design gives additional protection against twist attacks; High security disc style cylinder includes an anti – Float feature preventing discs from moving and readjusting when in transit.; Includes 3 Stainless Steel Keys – 2 New (I) keys and one with a highintensity LED buld for convenient, easy unlocking in the dark