National Square Corner Brace 537 x 3 x 3/16 in. Black is a heavy-duty square corner brace designed to reinforce 90-degree angles effectively. It can be applied to either the inside or outside of the corner, providing excellent stability for wider building materials. Featuring slots for 1/2 inch carriage bolts and single bolt holes, this brace ensures easy installation. Its square shape a greater area of stability, while the rounded corners deliver a clean, finished look. The black powder coat finish enhances weather resistance, making it suitable for various applications. Please note that the safe working load depends on the specific application and fasteners used, so consulting with design professionals is to ensure this product meets your needs.