●Chain Size: 4mm ●Reference Weight: 20.9 oz (580 g) ●Included keys: 3 ●Hardened steel chain with a length of 180cm ●With this single unit, you can lock the front and rear wheels, pedals, saddles, and bottle cages, and prevent parts from being stolen ●The chain lock is difficult to cut with small wire cutters for high security ●The cylinder is anti-theft and the dimple key system is difficult to bend keys ●Compact design that folds down to fit in pants or jersey pockets