Hinges – Allow the door to swing open or closed.
Handles – Used to grip and operate the door, available in knobs, levers, and pulls.
Locks – Secure the door; includes deadbolts, mortise, and cylinder locks.
Latches – Mechanisms that hold the door closed without locking it.
Closers—Automatically return the door to a closed position after opening.
Stops—Prevent the door from opening too far and damaging walls or fixtures.