The Ergotron LX is a single monitor arm that clamps to the edge of your desk and holds screens up to 34 inches and 11.3kg. It uses a constant-force spring mechanism to allow smooth repositioning with one hand, so you can adjust your monitor height, depth, and angle throughout the day without tools.
The arm provides 33cm of vertical lift, extends up to 64cm from the desk edge, and folds back into a compact position when not in use. Tilt, swivel, and full 360-degree rotation let you switch between landscape and portrait orientation or share your screen with a colleague. Integrated cable management routes cables under the arm to keep the desk tidy.
It ships with both a desk clamp (for surfaces 1-6cm thick) and a grommet mount, so it works with most desk setups. Ergotron backs it with a 10-year warranty. At around £130, it sits at the premium end of the single monitor arm market but is widely regarded as one of the most reliable options available.