4Pcs 8inch Boat Trailer Bunk Brackets Set Sturdy Repair Parts Professional Easily Install Universal Accessory Square U Bolts Steel MaterialMade from high strength steel, this 4 piece set of 8 inch boat trailer bunk brackets offers durability and stability, ensuring your boat remains firmly supported during transportation FitmentThe 8 inch boat trailer bunk brackets kit fit for 3 x 3 inch, 2 x 3 inch, and 1.5 x 3 inch boat trailer crossbeams About InstallationSquare U bolts allow easy attachment to the boat and trailer. The installation involves mounting the bracket on beams before or after the axle or on C channel beams with galvanized U bolts wrapped around it. washers and nuts secure the bracket in place FeatureSlotted holes on the bunk bracket can be used for height adjustment. Equipped with an 8 inch swivel top that can be easily adjusted to accommodate different hull shapes and angles, this adjustable design ensures optimal support and alignment for your boat Package IncludesMain Bracketsx 4, Top Bracketsx 4, U Boltsx4, Washersx32, U Bolts Nutsx 8,Nutsx 4, Screwsx 4,Taper Screws x8 Package Includes: 1 8" Boat Trailer Bunk Brackets Kit Note: Please allow slightly errors 1-2cm differences due to manual measurement.