The Kryptonite Kryptolok Mini-7 U-Lock features a 12.7 mm hardened performance steel shackle with a double deadbolt anti-rotation design that resists bolt cutters and twisting leverage attacks. The lock&&';;s disc-style cylinder with center keyway is protected by a vinyl coating and is pick and drill resistant. The keyway also features a sliding dust cover to protect the cylinder from dirt and debris when not in use. It includes two stainless steel keys with an ergonomic design to reduce torque and keep them from bending or breaking. Rated at a 6 / 10 on our security scale, the Kryptolok Mini-7 is good for quick stops in a metropolitan area, a couple hours in the suburbs, or all day & overnight in rural areas. It also includes our patented FlexFrame-U Bracket providing convenient multi-location U-Lock transport. The combination of these great features and our support programs including Key Safe, Anti-Theft Protection, and Lifetime Warranty make Kryptonite Bicycle Locks the best choice for protecting what you value. - 12.7mm hardened high-grade performance alloy steel shackle resists hand tools - New hardened double deadbolt engages both shackle-ends increasing holding power - Patented new "pass-thru" crossbar design includes anti-rotation features providing advanced protection against twist and single cut attacks - Includes FlexFrame-U bracket providing convenient multi-location u-lock transport - Includes 2 stainless steel keys with an ergonomic design to reduce torque and keep them from bending or breaking - New sliding dustcover - Reinforced hardened crossbar design provides more protection for the lock internals - Key Safe Program - Product dimensions: 3.25" x 7" (8.2cm x 17.8cm) - Product weight: 2.5 lbs (1.13 kgs)