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 a long service life. Despite their compact size, they offer sturdy support. Hidden shelf brackets are designed to be installed within the wall and inside the cabinet shelf. After installation, the brackets are not visible, providing a clean, seamless look. Without exposed hardware, the furniture is easier to clean. To install the hidden brackets, 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 fit 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 shelf brackets offer reliable performance and are ideal for supporting floating shelves. They give shelf furniture a sleek and modern appearance. Specifications: Material: Galvanized solid steel, surface nickel plated with matte black powder coating Color: Black Size: 128*20*63mm Package Include: 4 Pcs Invisible Shelf Brackets