The Adjustable Keyboard Tray by 3M is height and tilt adjustable. Just flip the lever to adjust height, and pull the tab to adjust tilt. The track is 22" long, and uses screws to mount to the desk. It features a built-in leatherette wrist rest which is easier to clean than other wrist rests, and lasts longer. It comes with a 3M Precise™ Optical Mousing Surface, which can be placed to the right or left of the keyboard.