The Fellowes® Professional Series Depth Adjustable Dual Monitor Arm features two monitor arms that adjust easily in every way for optimum viewing control. Easy to mount--clamp attaches to desktops 1"-3" thick or through grommet holes at least 3-1/4” in diameter. Elevates LCD monitors from 3-1/2" to 16-1/2" above the desk with a reach of 2-1/2"-21-1/2". Tilts up or down +/- 37 degrees and freely swings left or right (360 degree rotation capability). Each arm holds an LCD monitor up to 24 lbs. Meets VESA mounting standards.