MAXIMIZED COMFORT WITH MINIMUM REQUIREMENTS - Install this articulating keyboard tray on a flat underside of wooden desks with a 18.75 X24 clearance and a floor to underside height of 27.75 . This will make sure that you have enough space for your new computer keyboard tray. SLIDE YOUR KEYBOARD IN AND OUT OF THE WAY - Your keyboard and mouse, conveniently within reach! Neatly slide your retractable keyboard tray under the desk and pull it out whenever you need to do some work! ENCOURAGES A BETTER WORKING POSTURE - Neck and shoulder pain at work? You can eliminate them by using the keyboard and mouse at the right angle! FERSGO s ergonomic keyboard tray allows you to easily adjust your preferred height and angle. A MUST HAVE FOR AN ERGONOMIC WORKPLACE - Promote a healthy workplace with FERSGO keyboard trays for desk. With this adjustable keyboard tray, you can create your own comfort at your office, study, and home.