The Professional Series Depth Adjustable Dual Monitor Arm features twomonitor arms that adjust easily in every way for optimum viewing control. Easy to mount--clamp attaches to desktops 1"-3" thick or through grommet hole. Elevates LCD monitors from 3-1/2" to 16-1/2" above the desk with a reach of 2-1/2"-27". Tilts up or down +/- 37 degrees and freely swings left or right (360 degree rota