Heavy duty 2" padlock with 2" chrome plated 5/16" diameter hardened steel shackle that uses your stock ignition key. Just insert the key, turn once, and the lock learns that key and you're done. Weatherproof with automotive grade stainless steel lock shutter keeps out weather and debris. 6-plate tumbler sidebar prevents picking and bumping for a smooth operating lock that Bolt backs with a limited lifetime warranty