I wanted something to hold up some foam core boards for a presentation I'm giving at the local agriculture festival. I designed these in Fusion 360.

I've only been into 3D printing for 2 weeks.

These grip 3/16" foam board perfectly.

Edit 10/16/19 I added another angled clip to be used on the top of the foam boards to hold them together. It's smaller and doesn't need the large footprint of the lower clips.