Oxford chain 8 lockoxfords chain 8 lock is a medium weight security chain with a tough double locking padlock with hardened steel shackle with a sold secure silver rating the chain 8 is designed to offer a good level of security at an affordable price the chain 8 is an 8mm square link chain covered with a flexible cloth sleeve to protect your bikes paintwork the chain 8 is supplied with 3 keys allowing several members of the household to use the chain features medium weight security ch