The Scosche PSM21006 is an adjustable antenna, MAC-XC, whip/flag mount for ATV and off-road vehicles. It features a 1/2-inch mounting hole in a 6061-T6 aluminium base with a black UV resin finish and includes a stainless steel tightening screw. The mount can be rotated 360˚ with 18 locking positions available. This mount requires a BaseClamp tube-clamp, sold separately, which come in a variety of diameters : 1.5", 1.75", 1.875", and 2.0". BaseClamp tube clamps include a stainless steel tightening screw. BAR MOUNT REQUIRED • See below for size options and adding to cart. Scosche Instruction Manual Popular UTV Bar Mount Tube Size Reference Guide: Arctic Cat Wildcat 1.75" Can-Am Commander/Maverick 2" Can-Am X3 1.875" Honda Big Red 1.625" Honda Talon 2" Kawasaki Teryx Perimeter 1.875" Kawasaki Teryx Crossbars 1.7" Kawasaki Teryx 4 Perimeter 1.875" Kawasaki Teryx 4 Top Crossbars 1.7" Polaris Ranger, RZR, RZR S, and XP Cage 1.75" Polaris Ranger, RZR, RZR S, and XP Top Crossbars 1.75" Polaris Ranger, RZR, RZR S, and XP Rear Harness Bar and Rear Bumper Crossbars 1.5" Redline Revolt 1.25" Redline Riot 1.5" Yamaha Rhino Cage 1.75" Yamaha Rhino Top Crossbars 1.5" XYZ Cage 1.75" XYZ Crossbars 1.5"