Mini 7 U-Lock Superior Strength: 12.7mm hardened performance steel shackle resists cutting and prying. Enhanced Security: Patent-pending hardened double deadbolt design provides extra protection against twist attacks. High-Security Lock Cylinder: Disc-style cylinder is pick and drill-resistant for maximum defense. Durable Keys: Includes 2 stainless steel keys with an ergonomic design to reduce torque and prevent bending or breaking. Dust Protection: Equipped with a new dust cover to keep the lock mechanism clean and functional. Convenient Transport: Comes with the FlexFrame-U bracket for versatile and secure multi-location transport. Protective Coating: Vinyl coating prevents scratches and weather damage. Additional Features: Backed by the Key Safe Program for key replacement. Protected by multiple patents: 6397648B1, 9079626B2, 9670698. Specifications: Dimensions: 3.25” x 7” (8.2cm x 17.8cm) Weight: 2.5 lbs (1.13 kgs)