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 are sturdy and reliable. Hidden shelf brackets are designed to be installed within the wall and inside the cabinet. After installation, the brackets are not visible, providing a clean and seamless appearance. Without exposed brackets, the furniture is easy to clean. To install the hidden brackets, use a 0.5-inch router bit to cut a 5-inch long pocket hole in the board. Ensure the board is at least 0.8 inches thick. Secure the floating shelf brackets using the two pre-drilled screw holes and attach them to 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 strong performance and are ideal for supporting floating shelves. The brackets enhance the appearance of shelf furniture, giving it a sleek and modern look. Specifications: Material: Galvanized solid steel, surface nickel-plated with matte black powder coating Color: Black Size: 128 x 20 x 63mm Package Includes: 4 pcs invisible shelf brackets