4pcs Floating Shelf Bracket, Metal Invisible Shelf Bracket, Heavy Duty Hidden Shelf Bracket, Invisible Wood Shelf Bracket Wooden shelf brackets are made of solid galvanized and nickel-coated steel with a matte black powder coat finish. These shelf wall brackets resist rust and bending, ensuring long service life. Although compact in size, they are sturdy and reliable. Hidden shelf brackets are designed to fit into the wall and inside the cabinet shelf. After installation, the brackets are not visible, creating a clean, seamless look. Without exposed hardware, the furniture is easy to clean. To install, use a 0.5-inch router bit to drill a 5-inch long hole in the board. Ensure your board is thicker than 0.8 inches. Secure the floating shelf brackets using two screw holes and insert them into the wooden floating shelves, then mount the shelf on the wall. When used for decorative shelves, these brackets help save space by eliminating external supports, allowing multiple shelves to be installed close together. These brackets offer strong performance and are ideal for supporting floating shelves. The design gives shelf furniture a sleek and modern appearance. Specifications: Material: Galvanized solid steel, surface nickel plated with matte black powder coating Color: Black Size: 128 x 20 x 63mm Package Include: 4 Pcs Invisible Shelf Brackets