Upgrade Point: The new version of the magic arm is designed with an integrated rubber ring, and the rubber ring is integrated into both ends of the magic arm by a special process, which effectively solves the problem that the original rubber seal is easy to fall off. If the original product has a rubber loss problem, please contact us and we will replace it for you. NOTE: Mechanical design you need to know before buying: The magic arm assembly is locked with a single wing nut in the middle. It means that the three balls of the magic arm can move freely before the button is tightened, and when you tighten the button, all the balls cannot move at all. Mounted with 1/4 ’’ screw is a rubber cushion which could prevent monitor scratches and help lock the monitor tighter It has an ergonomic wing nut for convenience, which could help to adjust the angles according to your needs 11 inch magic arm equipped with 1/4’’ screws respectively on both sides. NOTE: The Maximum Load: 1.5 kg It attaches