Yes. Many different padlocks can be got on the same key number, so that "one key" convenience can be had even with a variety of padlock models. There are some limitations (you can't use a big key in a tiny lock) but across a broad range of sized and qualities, you can order them keyed alike. For example Master padlock models 1 through 6 can all operate on the same key number. Then any of our Pro Series padlocks can be custom keyed to match that key.