Swivel Top Design: Swivel Top Bunk Bracket Kit with Hardware is used to install on the Boat Trailer Crossmember and secure your bunk boards to the swiveling tops.The adjustable swivel top bolster support allows you to align the angle to contour to the boats hull; whether angled or flat.

Fits Your Crossmember: L-Type Boat Trailer Bunk Bracket Kit Included U Bolts, The U Bolts measure 1/2" in diameter, 3" wide, by 4.5" long. The U Bolts adopts a 3.1 " extended thread design and is suitable for 3" x1.5 "， 3" x2 "，and 3" x3 trailer crossbeams.

Easy to Install: Galvanized square U-Bolt can be easily fixed on boats and trailers. Install The Boat Trailer Bunk Brackets Mounted to cross members in front and behind the axle or mounted to cross members that are C Channel in shape,The galvanized u bolt wraps around the brace, and the washers and nut secure the bracket in place. The slotted holes in the bunk support allow for height adjustment.

Quality Construction: Swivel Top Bunk Bracket Kit adopts concave to prevent rotation, also It is made of heavy metal materials, with galvanized surface, rust and corrosion resistance, and is not easy to bend or deform for freshwater and saltwater boat trailers.

Packaging Includes: Boat trailer board mounts kit includes 4 swivel top brackets, 4 slotted bunk brackets, 4 zinc plated bunk bracket bolts, 4 galvanized mounting U-bolts, along with all necessary hardware.