Featuring patented BOLT Breakthrough One-Key Lock Technology the BOLT Padlock works with your vehicle ignition key. Each padlock has a hardened steel shackle and a stainless steel lock shutter and has achieved the ASTMs top corrosion resistance rating. The BOLT Padlock is the perfect lock for trailers, gates, storage sheds and units, or anywhere you would use a padlock! Combining the security you have come to expect from the leading padlocks with the convenience and time savings of having only one key the BOLT Padlock is perfect for everyone.