This is an ultimate monitor desk mount Mechanical Spring. It comes with full motion capabilities to enhance the use of computer monitor. Poor ergonomics with incorrect monitor height and angle can result in back and neck pain. FEATURES AND SPECIFICATIONS: VESA 75x75 and 100x100 compatible. Fits all monitor brands with VESA patterns. Spring assisted arms offer fingertip height adjustment of 11.5 inches. Spring tension is adjustable to suit the weight of your monitors. Weight capacity: 4.4 to 17.6 lbs for the arm Tilt: 90 degrees up / 90 degrees down. Swivel: 360 degrees at two joints and 180 degrees at one joint. Rotate: 360 degree (between landscape and portrait modes). Desktop thickness: 0.39-3.3 inches C-Clamp and Grommet base options included. Quick-disconnect VESA head allows easy removal of monitors. Premium Aluminum and Steel materials for sleek look. Cable management on the arms. Works with curved monitors.