Adjustable Angle: The top of our 8 Galvanized Swivel Top Boat Bunk Brackets is an adjustable bracket, you can align the angle with the contour of your boat, whether it's angled or flat. This boat trailer bunk brackets has a very perfect fit to the hull of your boat, which will ensure you a safe ride Unique Design: Our swivel top bunk bracket kit's U-bolts are designed for 3 inches x3 inches , 2 inches x3 inches and 1.5 inches x3 inches trailer transom, suitable for all kinds of boats, trailers and more High Quality Material: The boat trailer bunks is made of steel surface galvanized with galvanized surface, rust proof and anti-corrosion, not easily bent or deformed Easy to Install: Our boat trailer bracket is industry standard 8 height, galvanized square U-bolts can be easily fixed on boats and trailers. Mount the boat trailer barn bracket to the cross member in front of or behind the axle, or to the cross member of the C-channel. Galvanized U-bolts wrap around the bracket and washers and nuts hold the bracket in place Boxing Accessories:Inside accessories of the boat bunk brackets include 8 brackets, 4 u-bolts, 32 spacers, 12 nuts, 12 screws Item Weight 1 pounds Manufacturer ZLY Item model number ZLY-SW8 Batteries Included No Batteries Required No Package Dimensions 8.58 x 5.94 x 4.61 inches Included Components (8) brackets, (4) U-bolts, (32) spacers, (12) nuts, (12) screws