Where I wanted to mount my shelf clips that hold the shelf there wasn't any studs in the wall. I was able to purchase hollow wall anchors that can hold 90 lbs. It's been several weeks now since I installed the glass shelf and the anchors are holding with no trouble. I rated this shelf a 4 star because it didn't come with any mounting hardware or mounting instructions. The shelf mounting clips are plastic instead of metal but you would have to look close to tell.