Kensington K60099US Premium Gas LCD Monitor Arm with SmartFit System SmartFit(TM) system lets you quickly and easily set your optimal viewing angle. Gas assisted height adjustment allows you to precisely follow SmartFit comfort color guidelines with fingertip ease. Resets easily for multiple users and Installs without tools to back desk edges up to 2.5" thick. Attaches to VESA mount on flat panel monitors from 19" to 21" and up to 20 lbs. Tilts to eliminate glare and rotates for portrait or landscape viewing and swivels away to save desk space.