FITMENT: Fits 2.18"x3", 3"x3", and 1.5"x3" trailer crossbeams. The included U-bolts are 1/2" in diameter, 3" wide, and 4.5" long, making it perfect for various trailer sizes
MATERIAL: Made of heavy metal materials, with galvanized surface, rust and corrosion resistance, and is not easy to bend or deform
FEATURE: Used to install on the Boat Trailer Crossmember and secure your bunk boards to the swiveling tops; the adjustable swivel top bolster support allows you to align the angle to contour to the boats hull; whether angled or flat
INSTALLATION: Easy to install, just bolt it, package includes swivel top brackets, slotted bunk brackets, zinc-plated bolts, galvanized U-bolts, and lag screws
MORE USE: Adjustable height and angle,can be easily fixed on boats and trailers, for Ski Boat, Fishing Boat or Sailboat