Material:Heavy duty steel, zinc plated for rust and weather resistance. Package Include:4-Piece 2 Corner (2 left brackets, 2 right brackets)Stake Rack Connector Set Screws included. Dimension:Each Wood Side Stake Straight Bracket is 5-1/8" long, 2-1/2" wide, with 5/16" diameter holes. Function:For tailgates and bulkheads to connect panels at right angles. Easy Installation :No cutting, Install directly.