Novel appearance design, designers around lightweight, small size, development length, easy to use and other aspects of the design of this highly practical lock. Features: Made of fine quality Zinc Alloy, more sturdy and practical to use. High securit y and drill resistant lock cylinder. One Lock can lock more than one bike. Easily fixed to the Handlebar, Seat Post. Multipurpose, fine for bicycles, skateboards, gates & fences, grills & lawnmowers, sports equipment, tool boxes & ladders. Specifications: Material: zinc alloy + alloy steel +ABS plastic +PA6 plastic +59 copper Color: Black Number of chain pieces: 26 pcs, single size: 16mm*45mm, using local carburizing heat treatment technology, hardness outside HRC45, internal HRC10-HRC25 Lock sleeve: zinc alloy + alloy steel (carburizing heat treatment hardness outside HRC45) Key: PA6 plastic +59 copper Unfold length: approx.850mm Folded Size: approx. 75 * 66 * 52mm / 3.0 * 2.6 * 2.0IN Weight: 570g / 1.26lb Package size: 150 * 100 * 50mm / 5.9 * 3.9 * 2.0in Packahe weight: 735g / 1.62lb Packing List: 1 * Anti-theft Folding Lock 2 * Loop Straps 2 * Screws 3 * Keys 1 * Lock frame