The supports are long steel bars that go through the shelves and into the studs in the wall. We predrilled holes for them before we tiled. We used oak planks seamed together to make a solid wood shelf." I love the hanging coffee mugs.
Put a shelf over a window and use the shelf brackets to hold a curtain rod- genius and beautiful AND gives a completely finished off look. I like the idea of having a shelf over the window in the kitchen or bedroom.