The RVHD6 heavy-duty phone mount with 8 inch multi-angle arm and 4-Hole AMPS drilled base is designed for mounting to a flat surface, including car or truck dashboards or consoles as well as other solid flat surfaces. It holds phones up to 4 inches wide, including Apple iPhone 12 Pro Max, iPhone 12 Pro, iPhone 12, iPhone 12 mini, iPhone 11 Pro Max, iPhone 11 Pro, iPhone 11, iPhone XS Max, iPhone XS, iPhone XR, iPhone X, Samsung Galaxy S21, S20, S10, and S9, Galaxy Note 20, Note 10, and Note 9, Google Nexus 6 and Nexus 5. The RoadVise phone holder swivels for both portrait and landscape viewing. This sturdy mount is highly adjustable and features three adjustment knobs at 2.5 inch intervals on the mount arm for easy positioning. Two additional 180-degree adjustment points at the top and bottom of the mount provide additional flexibility. The mount base attaches with screws (screws of two different lengths included). The 4-Hole AMPS pattern consists of four holes located in a rectangular pattern spaced at 30.17mm x 38.05mm (measured as the center-to-center distance between holes). This mount is solid and sturdy enough to be used in commercial and enterprise settings, including fleet trucks and vehicles.