They claim to be a perfect 90 degree, but they aren't. As soon as you hang the shelf, it bends. You may not be able to tell from the picture, but I can't even keep an apple or peach on my new shelf, because it will roll right off. And I don't have anything heavy on it. Just some cereal boxes and paper plates. But even with nothing at all on it, it still says like crazy. Do yourself a favor, and buy something elseSee full review