The RM57502XAMPS 8 inch Heavy-Duty Metal 4-Hole AMPS drill base mount is part of Arkon's Robust Mount Series. Ideal for commercial use, it features Arkon's 5 inch metal 57mm (2.25 inch)-compatible shaft arm with circular metal AMPS drill base as well as an AMPS head. It can be drilled into solid, flat surfaces, such as car dashboards or consoles as well as walls, tables, and workbenches. The double ball mount is compatible with devices having a 4-Hole AMPS pattern, including cameras, GPS devices, or satellite radios. This tough mount is also ideal for mobile radio holders, housings, and other devices used by public safety, construction, and utility applications. This package includes only the heavy-duty mount with metal 4-Hole AMPS drill base and head.