This lock uses a steel ball click combo gear system to create up to 10,000 possible user combinations. Heavy duty steel cable are self-coiling for convenience and vinyl coated cables protects paint and finishes. Lock also includes a twist lock quick release multiposition mounting bracket and limited lifetime warranty. Additional features include: Lock head is permanently forged to cable ends. Attached Velcro straps contains coil during transport. Double rubber coated lock head covers protect paint and finishes.