To set up this lock, just place your ignition key inside and turn it once. That's all it takes to allow this lock to learn that key, and it will only open to that key. This is the only padlock that you can open with your car key. It's constructed with a core of solid zinc and has a shackle plated with zinc-nickel. The cylinder is automotive grade and has a 6-plate tumbler to prevent anyone from picking or bumping it. Moisture and dirt are kept out with its stainless-steel shutter and the weather-resistant jacket. This lock is manufactured in the USA and has the top corrosion-resistance rating given in the ASTMA. It comes with a lifetime warranty.