The TygerClaw Sit-Stand Desk Converter allows the user to turn any fixed-height desk into an active workspace. Easily operated with a single handle, it provides unhindered 110-505mm (4.3"-19.9") up-and-down adjustments on the advanced gas spring mechanism. The converter also proposes a perfect solution for daily work. The 950X400mm (37.4"X15.7") upper desktop has plenty of room to work and the convenient lower keyboard tray offers enough area for a keyboard and mouse. Features / Specification Counter-Balance Gas Spring: creates smooth and quick transitions Squeeze Handle: adjusts the height in a snap Lower Keyboard Deck: holds keyboard and mouse side by side and raises in sync with the top surface creating a comfortable work space Non-skid Silicone Pads: protect work surface from scratches or scuffs Eco-Friendly Particle Board: features heavy-duty and moisture resistance Smooth and quiet height adjustment