This 12 inch Hot-Dipped Galvanized Roller Bracket is designed to fit 12 inch Keel or Straight Rollers . You will commonly see these mounted to cross-members along the center line of the boat, both towards the rear and front of the boat. You will see a picture of what this bracket could look like once mounted!
Slotted for adjustments to fit cross members up to 4 inches Tall, the U-Bolts typically for a 3 inch x 3 inch cross member are 1/2 inch x 3 inch x 4 5/16 available above in both Hot-Dipped Galvanized or Stainless Steel. If you are needing a different size check out the Boat Trailer U-Bolts and Boat Trailer Bolts.
Also adjust the height of the roller to raise or lower for best positioning