●Chain Size: 4mm ●Reference Weight: 16.9 oz (480 g) ●Included keys: 3 ●Hardened steel chain with a length of 140cm ●You can lock the front and rear wheels, saddles and frames into fixtures with this single unit ●The chain lock is difficult to cut with small wire cutters for high security ●The cylinder is anti-theft and has a dimple key system that prevents key bending