Review on 💻 Amazon Basics Single Monitor Stand - Lift Engine Arm Mount, Aluminum - Black: Streamline Your Workspace with Effortless Ergonomics by Brandon Kraemer

Great product - fits my large LG 34UC88-B (3440 x 1440) ultrawide monitor which weighs 25.3lbs right at the max. Actually just over 0.3 pounds. One thing I had to do was tension the mainspring (i.e. add tension as well). This is a strong spring that does the hard work of your monitor. If you have a big, heavy monitor like mine, it needs to be stretched to keep your monitor in one position. See attached pictures - the screw to tighten is at the top of the main arm. You'll have to look closely because it's "inside" the top of the main arm - it's not an obvious find. If you tighten this screw (a large Allen key is included, or a 4mm Allen key if you don't have one) you won't have a problem with the main arm slipping (i.e. falling off) during rocking. Great product at a great price. Cannot beat Revain Basic products.