Diamond Antenna K400 Series trunk and hatchback mounts are deluxe, heavy duty mounts for your vehicle. They are one of the strongest, most universal mobile mounts available. Diamond Antenna mounts' 2-axis adjustment gives you the flexibility you need for the antenna mounting location, including trunk lid, hatchback, vertical door edge, and more. They're recommended for large VHF/UHF and medium size HF antennas, including the Diamond Antenna SD330 and SD330-3-8 Screwdriver Antennas, as well as for the Yaesu ATAS-100, ATAS-120, and Tarheel and Little Tarheel II screwdriver antennas.