Angler's Fish N Mate Rod Rack adapter for 4 and 6 rod holders. Few trucks have a flat front bumper that you can simply bolt the rod rack to. You're going to need this rod rack hitch adapter so the rod rack connects to the 2 inch receiver on your truck. The adapter easily bolts to the flat plate on the rod rack. If you're using a rod rack on the front of your truck, you also need the 2 inch receiver pre-installed. We don't sell receivers. Check with a reputable online retailer like Hidden Hitch to determine the exact receiver your vehicle requires. Mounting plate face is 3" x 12".