8'' L-Type Boat Trailer Bunk Bracket Kit Fit for 3 x 3 cross member, installation is very simple,Mounted on top of the frame or below it, Tighten the screws to be done. Heavy-duty zinc-coated steel construction, Therefore, they are difficult to bend or rust, ensuring a prolonged service life when in contact with saltwater. Multiple mounting holes on the bunk L-type bracket support adjust to different heights to meet your trailers needs Package included 8" L type brackeets 8*square U-bolts, 16*hex nuts, 16*flat washers, 16*lock washers,1pc Wrench 8'' L-Type Boat Trailer Bunk Bracket Kit Fit for 3 x 3 cross member, installation is very simple,Mounted on top of the frame or below it, Tighten the screws to be done.