How well do you think those would hold up on a glass table with a 20.1 wide and 19" viewsonics?
The clamps are good sized and it looks like they could clamp onto anything from 1/2" thick to 3+" thick. BUT, I am no engineer. Those clamps with monitors cantilevering out put a lot of pressure onto a small surface. Wood and particle board will flex a lot before breaking. Glass is a different story. WicKeDcHilD had a great idea with using wood to clamp to. The wood would help protect the glass and transfer the load to a larger area. My advice would be proceed with caution. I would hate anyone to clamp onto a glass top and have it break from the load of the monitors.