4pcs Floating Shelf Bracket, Metal Invisible Shelf Bracket, Heavy Duty Hidden Shelf Bracket, Invisible Wood Shelf Bracket. These wooden shelf brackets are made of solid galvanized steel with a nickel coating and matte black powder coat finish. The shelf wall brackets are rust-resistant and durable, ensuring long-lasting performance. Despite their compact size, these metal shelf brackets are strong and sturdy. The hidden shelf brackets are designed to be installed inside the wall and within the cabinet. Once assembled, the brackets are not visible, providing a clean and seamless look. Without external supports, 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, ensuring the board is thicker than 0.8 inches. Secure the floating shelf brackets using two 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 visible supports, allowing multiple shelves to be installed close together. These shelf brackets offer reliable support and enhance the appearance of your 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: 128x20x63mm. Package Includes: 4 Pcs Invisible Shelf Brackets