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 3-1/4" 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 from 2-1/2" to 27". Tilt up or down positive/negative 37 degrees and freely swing it left or right with 360-degree rotation capability. Meeting VESA mounting standards, the monitor arm mounts to surfaces up to 3" thick without tools and holds LCD monitors up to 21" or 20 lb.