Hanging items on an RV Door

For a permanent installation, I recommend "molly" bolts. You should be able to find them at any hardware store. They come in different sizes based on the thickness of the material they will be fastened to. You want to get "molly" bolts designed for thin material. I used them to mount a paper towel holder under the kitchen cabinet. As you might expect there is a lot of tugging on the towels, but the bolts have held just fine. A final caution: Molly bolts are permanent. Once installed they cannot be removed. You can remove and reinstall the towelbar as many times as you want, but the bolts will remain attached to the door.