These brackets are for front wall mounting for the library shelves with spacer blocks for baseboards. Designed to work with Library Shelves - 177161, 177162, 177171 & 177172. Order at least one wall fastening set for each third shelf and at least one set of diagonal braces for each shelf wall separately. Robust and durable shelving solutions for small and large rooms. Comes with two brackets. Made of powder-coated steel metal.