Sturdy and Durable Wood 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, these metal shelf brackets can support shelves weighing up to 80 pounds.Invisible and Hidden Hidden shelf brackets are designed to fit inside the wall and within the shelf. Once installed, the brackets are not visible. With no external brackets, the shelf is easy to clean and provides a clean, seamless look.Easy to Install To install these hidden brackets, use a 0.5-inch router bit to cut a 5-inch-long mortise in the back of the shelf. Ensure the shelf is at least 0.8 inches thick. Secure the floating shelf brackets using the pre-drilled screw holes, then mount the shelf to the wall.Save Space These brackets allow shelves to be mounted flush against the wall without visible supports, maximizing space efficiency. This design enables multiple shelves to be installed close together.Wide Application These shelf brackets offer reliable performance and are ideal for supporting floating shelves. They enhance the appearance of shelving furniture, providing a sleek and modern look.