My bathroom is tiled over 1/2" cement board and 2 x 4's. The anchors cannot be used unless you are only going through the 1/2" board. Add 1/4" tile and the anchors will not expand. Not what I would expect from a company like Moen. Now I have to stop work and run out to a hardware store to hopefully find something that will work with the 5/16" holes already drilled in my new tile.