The Oxford Patriot chain lock LK745 has an ultra-strong, 12mm square link chain made from Ni-Cro-Mo alloy steel. The chain has a protective cloth sleeve to help prevent paintwork damage. The padlock has an advanced 4-way locking system and comes with an extended length 14mm pin perfect for use as a chain lock. The padlock can be used as a disc lock to double security only when combined with the chain. Oxford Products offers a key replacement service. The chain is case-hardened to resist bolt cutters and zinc-coated to prevent corrosion. Long links reduce weight and can be stowed under your seat. It fits all Oxford ground anchors. The padlock has a 14mm rotating locking pin to prevent attack.