20 pounds max.

I bought this mount because I wanted to be able to adjust both the vertical and horizontal alignment of my new HDTV panel. The product description says this item can handle up to 50 pounds. My panel is about 44 pounds and the vertical adjustment simply cannot handle the weight of the panel. I used the "heavy load" bolt that's supposed to take care of this but it doesn't even come close. The TV doesn't just slip down a bit. It just sags against the wall. I can't imagine this mount could hold up a panel over 20 pounds without assistance.

FWIW, the mount does feel sturdy and it can hold the panel securely. I'm using a block of wood to offset the bottom of the panel from the wall. I'll replace that with a V-shaped brace that acts as a cable guide and will let the horizontal swivel function of the wall mount to work properly.

Also, the screws included with the mount were too small. They didn't fit my TV and the screw heads were so small, they slipped through the larger 100mm mounting  more