Herman Miller Monitor ArmsSingle arm. Clamps to a surface, mounts on an architectural wall, or attaches to a panel, frame, connector, or monitor arm tile; holds up to 20 pounds.Dual arm. Clamps to a surface and can support two arms on a single pole, creating a dual display configuration for two flat-panel monitors or a monitor/laptop combination; each arm holds up to 20 pounds.Lift assist for easy adjustment. The monitor arms are available with patented lift and pivot motion technology; with minimal effort, you can quickly move your monitor to the position that best supports ergonomic comfort, reducing eye, back, and neck strain.Extensive range of motion. A 13 -inch vertical range meets the eye height of more than nine out of 10 adults; provides 150-degree monitor rotation, 80-degree tilt, and 90-degree horizontal rotation for portrait or landscape viewing; swivels 360 degrees; maintains stability during adjustment.Quick-release option. A snap-in bracket allows for quick and easy installation or removal of a monitor.Teams with keyboard trays. Using a keyboard tray with a monitor arm frees up work surface space.