The thin wallboard won't support much weight, so be careful what you hang on them. For small framed photos, we use heavy duty velcro, and maybe a pin-type picture hanger. Towel rings usually require a molly and a #6 or #8 screw. But you have to watch how you tug on it, or it may start to pull out. If you just run a screw into the wall, it's almost a guarantee that it will come loose unless you find a wall stud to drive it into.