National Catalog 1181BC. Heavy duty mending plates in black finish. Used for reinforcing, attaching, connecting, aligning, and splicing materials. Slots for 5/16 In. carriage bolt. Black powder coat finish for improved weather resistance. Warning: The safe working load for this product depends upon the application and fasteners used. In order to reduce the risk of personal injury or property damage, consult with design professionals to determine if this product is appropriate for your application.