The Abus Steel-O-Chain 9808 Chain Lock offers excellent protection from picking and tampering - No matter if someone tries to pick the bike lock or the “Plus” cylinder with special tools, they won’t get very far. The hidden “Plus” cylinder is the safest disc cylinder currently used in Abus products.Abus Steel-O-Chain 9808 Chain Lock Features8mm thick square chainThe chain, the lock body and supporting elements of the locking mechanism are made of specially hardened steelAutomatic keyhole cover to prevent corrosion and the ingress of dirtAbus Plus cylinder for high protection against manipulation attempts, e.g. pickingGood protection at medium theft riskThe longer the chain, the easier the bicycle can be locked to a fixed object