This monitor arm offers a stylish, ergonomic design that delivers swift movement with easy adjustment, 360-degree pivot and 105-degree tilt. Increase or decrease tension with built-in tool. Internal cable management allows cables to route neatly under the arm. Quick-release mechanism allows easy installation and removal of the monitor and arm. The universal base may be used as clamp that adjusts to a tabletop thickness up to 4" or grommet mount that ranges from 3/4" to 3". Grommet adjusts to tabletop thickness of 7/8" to 1-1/2". The 12-3/4" high post mount is designed for one monitor up to 33 lb. and includes one extension bracket. Single-extension monitor arm is made of aluminum alloy and strong metal material. It includes mounting hardware.