Elevates flat panel monitors to comfortable viewing height to prevent neck strain. Includes five 1" height adjustments. Supports 21" monitor screens up to 20 lbs. Tilts up or down +/- 45 , pivots left to right 180 , and allows 360 screen rotation. Clamps to surfaces up to 2 1/2" thick (2" desk overhang required) or mounts in grommet hole. Includes cord management system.