If you've got a boat trailer that needs new bunk brackets, this 8-inch swivel top kit has everything you need. The brackets are specifically designed to fit 2x3 inch boat trailer crossmembers, and the swivel top feature is genius - it lets you adjust the angle to perfectly contour to your boat's hull, whether you need a flat surface or an angled one. The hot-dipped galvanized finish means they'll resist rust and corrosion from water exposure, which is crucial for boat equipment. You get multiple slotted holes for height adjustment, so you can fine-tune the positioning until it's just right. The package includes 8 brackets, 4 U-bolts, screws, spacers, and nuts - basically everything required for installation. The U-bolts measure 1/2 x 3 x 3 5/16 inches and wrap securely around your crossmembers. Installation is straightforward - mount the brackets to the beams, wrap the U-bolts around, and tighten everything down with the included hardware. The combination of metal and ABS materials makes them durable yet relatively lightweight. Whether you're replacing worn-out brackets or building a new trailer setup, these provide that secure, adjustable support your boat bunks need.