Deadbolts are usable on pretty much any door that you can find, with a few exceptions. The material doesn’t usually make a difference, but a locksmith will charge more to install a deadbolt in a metal door than in a wooden or fiberglass door. The main restriction is how the door opens. If the door is a sliding door, it may not be compatible with a deadbolt lock. If the door is one that opens on hinges on one side, then a locksmith should have no problem installing a deadbolt on it. Talk with your local locksmith and they’ll inspect the doors you’re considering to let you know if it will work.