Review on Mount It Dual Monitor Desk Mount, Height Adjustable Arm for 32 Inch Screens, VESA 75x75 and 100x100, 20 lb Capacity, Black/Silver (MI-1772) by John Contreras

Ok. The instructions are not very good. But it's a very good device. Amazing it came from China! People who leave bad reviews have the same problem as me and say it doesn't hold up the monitor. It should support up to 20 pounds. For reference, a 40" monitor weighs about 20 pounds, and if you're using it on a 40" monitor, I think you simply have the wrong mount. It holds my 14-pound 28-inch BenQ 4K monitor well. The problem is in the piston pin. Most people are used to "right-handed" (clockwise) and "left-handed" (counterclockwise). We were all taught that. But if you turn the piston screw clockwise, you actually loosen it. Piston screw on top of center bend of bracket to LEFT or counter-clockwise. When I tried turning the screw clockwise, I was initially dismayed that my monitor was "tilting down" all the time. In my hand I realized the tightening pattern was "opposite as usual". Once properly tightened, it held my 14 lb 28 inch monitor perfectly. I have purchased many of these mounts to create a custom workspace for a disabled person and so far this is by far the best swivel extension mount I have found. We'll keep you up to date.