Feature: 1. POWERFUL FUNCTION: Keep your bunk board secure with adjustable rotating top support pads that allow you to adjust the angle for a perfect fit with the contour of your boat. 2. GALVANIZED ZINC CONSTRUCTION: Featuring a zinc plated square U bolt, this kit is easy to install on boats and trailers, preventing rust and oxidation for long lasting durability. 3. EASY INSTALLATION: Mount the bed frame support on front and rear axle beams or on C channel beams, secure it with zinc plated U bolts, washers, and nuts, and adjust the height with slotted holes on the support. 4. PREVENT ROTATION AND RUST: Designed with anti rotation features and made of heavy duty materials, this kit is resistant to bending and deformation, ensuring your bunk board stays in place. 5. COMPLETE SET: Includes rotating top frame, slotted bed frame support, zinc plated bed frame support bolts, U bolts for installation, and zinc plated screws for securing boat trailer bunk boards. Specification: Item Type: Swivel Top Bunk Bracket Kit Material: Metal Fitment: Suitable for 3in x 3in trailer crossbars Design: Brackets, Top Corners and U Bolts are Hot Dip Galvanized. Application: For securing trailer crossbars, etc.. Package List: 4 x Rotating Bracket 4 x Support Bracket 4 x Square U Bolt 57 x Installation Accessories