14mm hardened MAX-PERFORMANCE STEEL SHACKLE resists bolt cutters and leverage attacks. Patented*, HARDENED OVAL CROSSBAR design is stronger than typical round tube. Hardened DOUBLE DEADBOLT DESIGN gives additional protection against twist attacks. HIGH SECURITY DISC-STYLE CYLINDER. Includes NEW TRANSIT FLEXFRAME-U transportation system which allows for versatile carrying. Protective vinyl coating. SLIDING DUSTCOVER protects and extends cylinder life. 3 STAINLESS STEEL KEYS – one lighted with high intensity LED BULB 7 REPLACEABLE BATTERY. Key Safe Program.Product dimensions: 4” x 9” (10.2cm x 22.9cm).