The Neilsen 10mm x 1m Motorcycle Motorbike Bike Security Chain and Padlock CT1063 is a high-security, heavy-duty bike lock designed to keep your bike safe. The chain is 10mm thick and 1m long, making it sturdy and long enough to securely lock your bike to a fixed object. With a key lock mechanism, this black chain lock offers peace of mind for cyclists looking to protect their bike from theft.