Mount-It! Expandable Two Monitor Computer Desk Mount Spring Arm Quick Release (MI-45116) Desk-mountable with C Clamp. Clamp table thickness: 0.79"-2.36" (20-60mm); Grommet table thickness: 0.79"-2.36" (20-60mm), Hole Diameter: 0.39"-1.97" (10-50mm) Weight Capacity: Supports 4.4 - 19.8lbs (2 - 9kgs) for each monitor; Tilt: 105; Rotation: 360; Swivel: Max 360; Mounting Pattern: VESA compliant: 75x75 and 100x100; Maximum extension: 15.75" (400mm) Pole length: 19.68" (500mm), makes it expandable to support 3 or 4 monitors. 7.87" Height adjustment; Solid Aluminum die-cast construction; Neat and efficient cable management; Easy installation and dis-installation. Quick mount & quick release designs at 3 connecting points: stand, spring arm and monitor end. Supports two LCD monitors; Maximum adjustment rendered by tilting, swiveling, pivoting and dynamic height adjustment