Offer a wider range of movement, the ultra wide monitor arm allows the screen to tilt up 90°/down 45°, swivel 180°, and rotate 360° from landscape to portrait. The gas spring arm has a maximum arm extension is 25'' and a maximum height adjustment is 19.7' from the work surface. Easily find an optimal ergonomic posture, and relieve strain on the spine, neck, and shoulders. The monitor desk mount support C-clamp (drill-free, quick clamp without bolt knob) and grommet (optional) mount. The VESA plate connected to the arm adopts a lock plate for safety-screw-free installation. With easy-to-follow instructions, this monitor stand can be assembled quickly and easily within 10 mins. If the thickness of your table is not within this range, please relate with us for a suitable C-clamp.