Ergotech's Free-Standing LCD Monitor Desk Stands require no mounting or clamping and are lightweight AND strong. With the patented Quick Release Pivots, installation and removal of monitors is quick and easy and requires no tools. Once mounted, the Height Adjustable Pivots provide effortless monitor positioning for left/right/up/down movement, as well as both landscape and portrait views. All Ergotech Desk Stands can upgrade to hold up to six monitors with just a few extra parts. Includes LIFETIME WARRANTY. Holds up to four 24" monitors.