Perfect option to add more vertical adjustability (15 cm mobility to go up and down) to an existing monitor mount Track-mounted monitor holder Perfect to E. G. Adjust two different monitors to the same height on an LCD bridge Easy installation on most monitor mounts with standard VESA plates (75mm x 75mm/100mm x 100mm) The toothed track keeps the adjustment smooth and stable. VESA adjustment plate has to be mounted the right way round