The Extreme Max Swivel-Top Bunk Bracket is the perfect option for the DIYer looking to build their own bunk trailer or the jack-of-all-trades working to repair an existing bunk trailer. The brackets mount directly to the trailer's crossmembers. The swivel top of the bracket sits at whichever angle you choose, providing a custom fit to your boat and trailer needs. The bracket installs easily, utilizing a U-bolt around the trailer crossmember to secure it to the trailer and a set of lag bolts to secure the swivel top to the bunk. Intended for use in freshwater applications only; oxidation may occur in brackish and saltwater. Extreme Max offers a variety of sizes to fit crossmembers 1.5" x 3" up to 3" x 3", as well as bracket heights available from 8" tall to 12" tall.