Review on WALI Single LCD Monitor Gas Spring Wall Mount: Fully Adjustable VESA up to 27 inch, 14.3 lbs Weight Capacity, 13.4 inch Max Extension (GSWM001S) - Black by Daniel Ogbebor

FYI: They list the weight limit in kg, so search in kg in pounds on google and it will tell you the weight limit. I wouldn't recommend this for a PC AIO if it would be interesting to switch from landscape to portrait mode. The function is locked with a screw. You remove the screw to allow free rotation. The problem is that most all-in-ones aren't designed for a swivel stand, which creates balance issues on the stand. Also, most AIOs will be too far ahead. You'd better choose an easel stand if you don't want to elevate your device in the air, otherwise this device creates a huge waste of space behind the device. I ended up using it on my LED monitor. To reduce the piston so it will not bounce further, hold the lever in its lowest position and then turn the screw clockwise with the Allen key. It takes an insane amount of twists to get it where it actually stays where I want it to be. As others have said, it's also pretty stiff in the back from the start. This can also be customized. I would say at least it lasts. I just don't think I'll be using gas spring levers in the future because they're so bulky and healthy.