Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) 14mm hardenedMAX-PERFORMANCE STEEL SHACKLEresists bolt cutters and leverage attacks Patented*,HARDENED OVAL CROSSBARdesign is stronger than typical round tube HardenedDOUBLE DEADBOLT DESIGNgives additional protection against twist attacks HIGH SECURITY DISC-STYLE CYLINDER IncludesNEW TRANSIT FLEXFRAME-Utransportation system which allows for versatile carrying Protective vinyl coating SLIDING DUSTCOVERprotects and extends cylinder life 3 STAINLESS STEEL KEYS one lighted with high intensityLED BULB & REPLACEABLE BATTERY Key Safe Program Product dimensions: 4 x 11.5 (10.2cm x 29.2cm)