[Solid Steel Plate]Trailer side brackets made of high quality heavy duty steel, coated,no easy rust.no deformation,sturdy and solid. [Product Size]Our trailer stake pocket accommodate standard 2inch x 4inch lumber on the market. [Practical Desing] The bottom of the trailer stake bag is designed to prevent the boards from sliding, rounded corners to prevent cuts.Trailer piles give you additional transportation space,Perfect for Flatbed Truck,Utility Trailer,Barn Door,Flat Wood Fence. [Convenient to Install] truck bed rail brackets have predrilling holes on both ends, easy to install and remove, you do not need to drill, slide right into opening, providing you a lot of convenience. Color: Black Material: Metal Package Contents: 4 * Bracket 8 * Bolt and nut (Accessories in different batches are random, and specified styles are not accepted.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.