Depth-adjustable monitor arm is fully adjustable for optimum viewing control. Easily mount the monitor arm with a clamp that attaches to your desktop or through a grommet hole. You can use the adjustable arm to elevate LCD monitors from 3-1/2" to 16-1/2" above the desk. Reach ranges a minimum of 2-1/2" to a maximum 21-1/2". Tilt up or down positive/negative 37 degrees and freely swing it left or right with a 360-degree rotation capability. Meeting VESA mounting standards, the monitor arm mountsto surfaces up to 2-1/2" thick with no tools required and holds LCD monitor up to 21" or 20 lb.