Buyers Products Mounting Brackets for Polymer Truck Tool Boxes are lightweight and corrosion-resistant. They are designed to securely hold your polymer underbody truck tool box. The pre-drilled brackets are formed from strong A-36 steel C-channels with a corrosion resistance black powder-coated finish. Designed for an exact fit and built for long life, the brackets keep their shape with welded angle braces that handle road vibration and impact without fail. The brackets are sold in boxed pairs.