Fully adjustable for optimum viewing control. Easy to mount ? clamp attaches to desktop or through grommet hole. Elevates LCD monitors from 3? to 16? above the desk. Minimum reach of 2? to a maximum reach of 27?. Tilts up or down +/- 37 and freely swings left or right (360 rotation capability). Mounts to surfaces 1" to 3? thick or through grommet holes at least 3 1/4? in diameter; no tools required. Meets VESA mounting standards. Holds LCD monitor up to 24 lbs.