When Looking for the Best, get something Sturdy Built. This is the Only Bunk Bracket Setup you will ever need! Made of ALL Stainless Steel and Aluminum Parts, Adjustable to Fit nearly Every Boat Hull Shape, and Heavy Duty for the Biggest Boats! This kit is also Great for Smaller or Medium sized Boats that Want the Best Bunk Bracket Setup possible. This Kit is Complete with all of the Parts and Mounting Hardware you need in order to fully replace the Bunk Brackets currently on your trailer. These Ultimate Bunk Brackets will only mount to 3x3 Crossmembers due to the Hat Bracket Hole spacing and the size of the Mounting U Bolts incldued in the kit. Most commonly used with 2x4 or 2x6 Bunks, these Bracket Assemblies can be used for either the Main Bunks on your trailer, or for the Smaller Forward Bunks to Support the bow of your Boat.