Diamond Antenna K412 Series Trunk and Hatchback Mounts are deluxe, medium-duty mounts for your vehicle. The Diamond Antenna mounts' 3-axis adjustment gives you the flexibility you need for the antenna mounting location, including the trunk lid, hatchback, vertical door edge, and more. They're recommended for medium size HF antennas under 45 inches. Diamond Antenna K412 Series Trunk and Hatchback Mounts set the standard and are used by Amateurs and professionals all over the world. * No holes or drilling required * Rubber mounting pad protects mounting surface * Two set-screws ensure positive grounding and mount strength