Buyers Products Aluminum Truck Box Mounting Brackets are lightweight, corrosion resistant, and designed for installing aluminum underbody truck boxes. Formed into strong, narrow 1/4 in. aluminum angles, they are built for exact fit and long wear. These brackets keep their shape with welded angle braces that can handle constant road vibration and impact without fail. Mounting is easy with a universal hole pattern design and brackets that are sold in boxed pairs for immediate use.