If you want a sleek, stylish looking side mount, you will want to look at the M2! This mount is specifically designed for use on vertical surfaces. It has an attractive black molded body that looks great on any vehicle. When installed, the coax connectors are concealed on the inside of the vehicle (requires one 13/32" (10mm) and one 13/64" (5mm) mounting hole). This mount may be used with single or dual installations. We recommended that it be used with Firestik of Firestik II antennas up to 3’ (92cm) or FireFly and RoadPal antennas up to 4’ (1.2m). The actual mounting surface is approximately 3.125" (79mm) x 1.675" (43mm). Outward protrusion is about 1.875" (48mm). This mount comes complete with all of the required mounting hardware, rubber gasket, metal reinforcement plate, nylon insulator and ground terminal lug. If purchasing a coaxial cable, consider our model K8 for single antenna installations or model K9 for dual antenna installations. The M2 can be mounted to surfaces up to 0.28" (7mm) thick. If using a spring with a base diameter larger than 0.700", a split lock washer is required between the mount and the spring to ensure proper seating of the spring to the mount surface.