Specifications say it supports up to 26.4 pounds and 35 inch screens. I have a dell S3221QS which weighs 23.4 lbs and is a 32 inch screen. I had to get a personal hex key to tighten it enough to not droop as I couldn't get a good enough grip with the hex key included with the product. I think if you approached the max weight any more it probably wouldn't be able to support the monitor.

Reply by our customer service

Hi Ian, Thanks for sharing your feedback. We are sorry to hear that you need to get a personal hex key to tighten the mount enough to not drop. If you have any other questions, you may reach out to us by submitting an online inquiry, initiating a chat or by phone at 1-866-979-7463.