Large, 46" wide adjustable desk riser easily allows you to go from sitting to standing. Desk riser raises up to 20" & lowers to 5" to optimize the ergonomic work position for people of all heights. Straight up-and-down motion minimizes the required desk depth to 23". The 25-3/4" x 11-1/4" retractable keyboard tray slides in & out, rising with the unit. Desk riser includes grommet hole for mounting monitor arm or running cables. Unit holds up to three monitors, a laptop & more with a 45 lb. capacity. Desk riser works with optional Lorell Deluxe Floor Stand (sold separately) to create a complete sit-to-stand desk or an extension to your current desk.