Reinforce 90deg angles by installing this heavy-duty National Hardware corner brace on the inside or outside of the corner. Warning: The safe working load for this product depends upon the applications 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. | HILLMAN 1151BC Corner Brace | Size 12-1/4" x 1.5" x 1/4"