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 Kit     Material: Metal     Fitment:     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 Bracket     4 x U Bolt     4 x Screw     8 x Screw     32 x Spacer     12 x Nut