The Evolution Standard U-lock has a 14mm hardened MAX-Performance steel shackle and disc-style cylinder. With a Kryptonite security rating of 8/10 it offers a high bike security in moderate theft risk areas. FEATURES: 14mm hardened Max-performance steel shackle 2 stainless steel keys Patent-pending hardened double deadbolt design gives additional protection against twist attacks New smaller crossbar design Higher security disc-style cylinder is pick and drill resistant Includes FlexFrame U bracket providing convenient multi-location u-lock transport Protective vinyl shackle coating Eligible for Key Safe Program: Register your key number with Kryptonite for easy replacement of lost or worn keys for a minimal fee Optional Anti-theft Protection Offer of up to $3,000 should you decide to register for coverage at www.kryptonitelock.com (additional costs may apply) SPECS: Product dimensions: 4” x 9” (10.2cm x 22.9cm) Product weight: 3.50 lbs (1.59 kgs