This is a rail-mounted monitor holder designed to increase mobility for most monitor arms. The slider features easy installation on most monitor mounts with standard VESA plates measuring 75 mm x 75 mm / 100 mm x 100 mm. With a rail on the mount, a monitor has an additional mobility of 15 cm up or down. The notched rail ensures smooth and stable adjustment, making it easy to move and lock the monitor into just the right position. Extensive testing has shown that this mount can support monitors weighing up to 8 kg while providing reliable mobility. The VESA monitor slider is a perfect accessory if you want to add more adjustment options to an existing monitor mount.