Fully adjustable for maximum visibility control, this dual monitor arm helps to expand your desk space. The clamp can accommodate flat screens and attaches to desks with a thickness of 1 inch to 3 inches or through grommet holes with a diameter of at least 3.25 inches. It lifts monitors from 3.5 inches to 16.5 inches with a reach of 2.5 inches to 27 inches, tilts 37 degrees up and down, and swivels freely left and right.