Diamond Antenna K540 Series Mirror and Luggage Rack Mounts are premium antenna mounts for your vehicle. These mounts are some of the strongest, most universal mobile mounts available and have the convenient Diamond wing-nut antenna fold-over feature. These Diamond mounts fit mirrors and utility racks with 1/2 in. to 7/8 in. tubing and have a black finish to help blend into your vehicle's silhouette. They're recommended for lightweight to medium-size antennas.