This sleek desk riser from Lorell features a large work surface on the top that can carry up to 33 lbs. for large screen, high resolution monitors and a bottom tray that can carry up to 5 lbs. for keyboards. The lever enables the user to easily increase the height of the riser up to 16.5 and keep it locked in that position. This X-type riser is powered by a gas spring for easy rising and retraction.