Monitors can be placed in portrait or landscape orientation. Heavy Duty C-Clamp - Mounts to the back of your desk (up to 3.25” thick) via a heavy-duty C-clamp or optional grommet mount.

This is important to get the edges of those monitors to butt up to one another. After making a pair of relief cuts he bent the channel in two places, using 45 degree brackets as reinforcement.