Oxford Heavy Duty Chain Lock 2.0mThe popular Oxford HD chain lock is a fantastic mid range lock which is light enough to be easily carried with you but still sufficiently secure to deter would be thieves. The HD Chain Lock comes with three keys and key replacement service. On receipt of your chain lock, note your key number and keep in a safe place. In the unfortunate event that you lose all your keys, a new spare can be made up for you. Features: Hardened 9. 5mm square link chain.