Feature:1. Application: The galvanized swivel bunk bracket kit with the flat surface is suitable for your boat's and trailer's 3in x3in cross members.2. Complete Kit: This kit contains everything you need to mount bunk boards (not included) to your trailer. Perfect for saltwater or freshwater use.3. Adjustable Height: Swivel bunk bracket is 8in height, with multiple slotted holes in the bunk support allow for height adjustment.4. Including Mounting U Bolts: The included hot dipped galvanized u bolts secure the bunk brackets to the crossmember for a tight fit, safe to use.5. High Strength Construction: Constructed of high hardness metal material, wear resistant, sturdy and durable, not easy to crack or break.Specification:Item Type: Swivel Bunk Bracket KitMaterial: MetalFitment:Fits 3in x 3in boat trailer crossmembers.Brackets measure 8in tall.Comes with 1/2in x 3in x 4 5/16in u bolts. Bracket, top angle and u bolts are hot dipped galvanized. Application: For trailer cross member fixing, etc..Package List:8 x Bracket4 x U Bolt4 x Screw8 x Screw32 x Spacer12 x Nut