National Catalog 1182BC Heavy Duty Mending Plate, 3 In. x 1.3 In. is designed for reinforcing two miter joint pieces that form a 90-degree angle. This heavy duty mending plate features a durable black powder coat finish that enhances weather resistance, making it suitable for various applications. It includes for a 5/16 inch bolt or two nails per side, with a 45-degree hole pattern that allows for easy installation. Please note that the safe working load depends on the specific application and fasteners used, so it is to consult with design professionals to ensure this product meets your project requirements. Model Number: 1182BC