This is a heavy duty mount that reaches way out in your truck. No more leaning forward to look at your handheld, this brings the handheld towards you! This mount goes out from 16″ to 21″ from the base for easy access to your handheld when in the truck. It is easy to adjust and can be done with just one hand. Works with both the Garmin Alpha 100 handheld and the Astro 430, Astro 320 handheld. The handheld slides right on and is easy to take on and off the mount. No fussing around with annoying clips!