Single Screen Pole-Mounted Heavy-Duty Mechanical Spring Monitor Arm Detachable VESA Plate Design: enables easy installation Built-in Spring Tension Mechanism: for perfect weight adjustments. Installs from Top Side: installs entirely from above the desk surface. Built-in Cable Management: for an organized and neat workspace Smooth Arm Insertion: ensures easy installation. Two Mounting Options: both desk clamp and Grommet are included 360° Rotary VESA Plate: for more viewing experience. Swiveling Arm(s): offer(s) maximum viewing flexibility (makes every seat the best seat) Free-Tilting Design: makes easy forward or backward adjustment for better viewing and reduced glare.