The only Cable Lock that will open with your car key, BOLT Cable Locks feature a solid zinc core, automotive grade cylinder with patented 6 plate-tumbler sidebar to prevent picking and bumping, a stainless steel lock shutter to keep out dirt and moisture, and a rugged Santoprene jacket to protect your gear. BOLT Cables are 6 long and 1/4 7? 14 GAC coated in black vinyl to 5/16 outside diameter, and coil sprung for compact storage. . Limited lifetime warranty.