This heavy duty wrought iron bracket can be attached to a square steel or wood post or a wall for a large HDU or wood hanging sign. It comes in standard widths of 29, 41 and 53 inches.The horizontal bar is heavy duty solid twisted steel, and the attachment flat plate is 3 in wide with four holes. A curved pIate is also acailable for attaching to round 3 in and 4 in diameter round posts. It has a black powder finish coat.