The only padlock that will open with your car key, BOLT Padlocks feature a 2 hardened, zinc-nickel plated shackle, 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 weather resistant jacket to protect your gear. BOLT Padlocks are , achieve the ASTMs top corrosion resistance rating, and come with a limited lifetime warranty.