The HD6VESA20 mounting pedestal can be used as a replacement, upgrade, or as an addition to an existing pedestal with a 4-Hole AMPS pattern. It is compatible with devices having a VESA 75 or VESA 100 mounting pattern. This mount includes Arkon's 9” Heavy-Duty Aluminum 4-Hole Drill Base Mounting Pedestal with Multi-Angle Arm and VESA 75/VESA 100 Head (devices and holders sold separately). This sturdy 9”mount features three adjustment knobs at 2.5” intervals on the mount arm for easy positioning. Two additional 180° adjustment points at the top and bottom of the mount provide additional flexibility in positioning the device. Formerly an industry standard, the 4-Hole AMPS pattern consists of four holes located in a rectangular pattern spaced at 30.17mm by 38.05mm (measured as the center-to-center distance between holes). The 4-hole drill base mount is made of strong aluminum, and is ideal for environments where a more permanent solution is desirable, such as in a workshop or in retail. Screws are included. This mount can also be screwed directly into the floor or console of a car or truck. (Warning: Drilling into the vehicle's floor may damage the vehicle. Use caution and consult a mobile install professional to avoid drilling into any sensitive vehicle components.) Adjust the multi-angle arm and rotate the swivel ball adapter head for 360° rotation for exact positioning of the device.