If you do not need to put a nail in your door, you probably don’t need a screw either. You may not even want to use adhesive. Never fear; there are two ways to make the most of this valuable hanging space to your hardwood door without causing any harm.
Over-the-Door Hooks
A hook that fits on the top edge of the door conveniently holds towels, towels, jackets and bathrobes, and it does not require any kind of fastener. You only set it in position over the surface of the door. Simple versions are produced from a single piece of molded vinyl while adjustable ones have a metal bracket which tightens on the door when something is hanging on it. These mounts fit smoothly between the door and the jamb once the door is closed.
Suction and Putty Hooks
Hooks with suction-cup bases are usually reserved for use on the tile walls, but also you can use one on your door when it has a window. The suction cup sticks to glass, however, never to timber, because the timber grain prevents the entire seal necessary for suction. An alternative for a solid hardwood door is a hook attached to sticky putty. This type of hook stays securely on the the wall till you pull the tab on the base to release it, but it just works for hanging heavier items.