Ergotron WorkFit-A Dual Workstation With Worksurface - standing desk converter - polished aluminum, black

"Ideal for corner workstations, the WorkFit-A clamps to the rear or side of most surfaces and enables an effortless sit-and-stand work style. Fold the keyboard up and swing the arm out of the way when youneed your desk surface.
Change from a sitting to a standing position whenever you want. This heigh-adjustable desk workstation moves your keyboard and display in one simple motion, making computing comfortable for prolonged periods. "