Features: 1. Made of high-quality zinc alloy and ABS plastic, more durable. 2. Adopting local sintering heat treatment technology, the hardness is higher. 3. High security and anti-drilling and anti-smashing lock cylinder. 4. One lock can lock multiple bicycles at the same time. 5. Easy to fix on handlebars and seat posts. 6. Multi-purpose, suitable for bicycles, skateboards, fences, grille mowers, ladders and tool boxes, etc. Specifications: - Material: zinc alloy + alloy steel + ABS plastic + PA6 plastic + 59 copper - Color: black - Number of chain pieces: 26 pieces, single size: 16mm*45mm - Unfolded length: 83cm - Folded size: 6.7*6.7*5.5cm - Weight: 734g Package: - 1 bicycle lock - 1 bracket - 2 screws - 2 keys - 2 tapes (anti-slip)