Function: This Swivel Top Bunk Bracket Kit 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.

Versatile: 3.1 " extended thread design, suitable for 3" x3 "， 2" x3 "，and 1.5" x3 trailer crossbeams .The 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 various sizes of ship trailer crossbeams.

Easy to install: This 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.

Prevent rotation, anti rust: Swivel Top Bunk Bracket Kit with Hardware 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.

Includes: swivel top brackets, slotted bunk brackets, zinc plated bunk bracket bolts, galvanized mounting U-bolts for the brackets and galvanized lag screws to secure boat trailer bunk boards.