Heavy-duty 10.5mm square link chain, fitted with durable nylon sleeve for avoiding accidental scratching and damage to the bike. Features hardened zinc alloy bodied disc lock with anti-drill, anti-saw and anti-pick protection on the locking cylinder. 4* ART Approval. Supplied with two keys. Features: Heavy-duty 10.5mm square link chain, fitted with durable nylon sleeve for avoiding accidental scratching and damage to the bike Features hardened zinc alloy bodied disc lock with anti-drill, anti-saw and anti-pick protection on the locking cylinder 4* ART Approval Supplied with two keys Specifications: Guarantee:1 Year Model Number: CLA109DL