FSA1/2H features two arms adjustable to the weight of the monitors, from light (8 pounds) to heavy monitors (up to 23 pounds). Arms offer 14" of horizontal adjustment. Screens can tilt up or down 20 degrees and the screen mounts and arms can rotate up to 359 degrees. Fully extended, monitors can project 22" maximum from the mounting post. The system includes wire management to help conceal the wiring. Arms attach to plates on back of most flat screen monitors, which must have the VESA 75 mm or 100 mm mounting pattern. Installing is easy; just drill a single 7/16" hole in desk or work surface, fasten from underneath.