UNIVERSAL SINGLE MONITOR ARM MOUNT: Fits all brands of 19 20 21 24 27 29 30 32 inch computer screens, with a maximum support weight of 20 pounds each, using the 75x75mm or 100x100mm VESA square bolt hole pattern found on the back of the monitors. Comes with interchangeable C-clamp or grommet base mount for use on desktops up to 3.3 inches thick.FEATURES: Gas spring monitor arm is heavy duty, counterbalanced and makes for effortless adjustments and comes with integrated, hide-away cable management. Aircraft grade aluminum alloy construction will stand the test of time.FULLY ADJUSTABLE: Single arm monitor mount can tilt, swivel, raise and/lower (see 6th image down for details). Screen can be rotated a full 360 degrees for portrait or landscape orientation. Use included hex key to turn the hex bolt on top of computer monitor arm to adjust the gas spring tension to hold screens in place (please see 5th image down for reference).EASY INSTALLATION: Monitor arm desk mount quickly mounts to desks and comes with all mounting hardware, tools, and instructions necessary for assembly. Quick-release detachable VESA plate mounts to back of monitor first, then slides onto arm in seconds!