I live in an apartment complex with tile for the bathroom walls. Drilling for a shower rod was not an option. The unit came with a tension rod which kept falling off, I assumed it was just a bad rod so I purchased a new one. Within a week, it was falling as well. I can only assume, the walls shift or shutter with the a/c unit overhead and a garage unit under as to why they would not stay up. After research, I found these self-adhesive disks and thought it couldn't hurt. They have been a life saver. You can barely see they are there; they don't detract from the room colors since they are clear. The disk is open on the top so you can use them with a variety of rod sizes.