Deluxe, adjustable desk riser offers a healthy addition to any desk, allowing you to sit or stand while you work. Large, 38" wide x 23-1/2" deep worksurface accommodates two monitors or a monitor & laptop. Ergonomic, retractable keyboard tray (25.5" wide x 11.25" deep) moves up & down vertically with the desk. Unlimited height adjustments range from 5" up to 20". Easily raise & lower with side handles. Gas shocks will assist, allowing you to easily move the desk up & down. Grommet hole allows you to route cables or add an optional monitor desk mount. Desk riser works with optional Deluxe Floor Stand (sold separately) to create a complete sit-to-stand desk or an extension to your current desk. Riser is fully assembled for use right out of the box.