The only quad monitor mount in the industry. Freestanding base retrofits to any desk. Compact work surface, push-button height adjust, locking cylinder provides stability. Quick, easy monitor install. Take the work out of adjusting and replacing monitors. Simply attach, adjust and remove all at the face of the beam. No need to slide monitors to remove. It features a 17" range of vertical height adjustment and a locking cylinder to keep the workstation in place. No manual adjustment needed.