The Kryptonite Evolution Mini 5 gives you bicycle security for moderate to high crime areas with a 13mm hardened MAX-Performance steel shackle resists bolt cutters & leverage attacks. New patent pending hardened double deadbolt design gives additional protection against twist attacks, high security disc-style cylinder is pick & drill resistant as well as Anti-rattle bumpers keeps the shackle snug against the crossbar to keep the lock quiet while you ride. The Transit Flex Frame-U mounts quickly & easily & supports the transportation of the most common U-lock sizes, the Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes. The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit & align with a bike frames specific geometry Rotating dustcover over cylinder protects from dirt & grime. Lifetime Key Registration & Key Replacement Vinyl coated & weatherproof Product dimensions: 3.25” x 5.5 (8.3cm x 14cm) Product weight: 2.65 lbs (1.20 kgs) Sold Secure Bicycle Gold certified