I mounted them with brackets on the frame of the feed belt to divert feed from the mixer. Keeps feed room clean, and saves feed. I put a small piece of screen over the inlet of our shop vac and put a clamp around it. It lets me clean out bolt bins and yet keeps me from sucking up bigger parts. Don't use too fine a screen.
Window screen works about right.
They will give 8-10 pounds of clamping pressure for any kind of gluing or holding tasks.