Oxford chain 10 lockoxfords chain 10 lock is a heavy duty security chain with a tough double locking padlock with hardened steel shackle with a sold secure gold rating the chain 10 is designed to offer the highest level of security the chain 10 is a 10mm square link chain covered with a flexible cloth sleeve to protect your bikes paintwork the chain 10 is supplied with 3 keys allowing several members of the household to use the chain features heavy duty security chain with sold secure g