Caliper style display stand. I used 3x 50mm m3 socket head cap bolts and some nuts to put this together. I used the washers on the end of the caliper bolts to provide a more aesthetic  contact area, and i found brass heat set inserts worked nicely as well. The holes are cut to 3mm and the screws will tap the holes as you install them.

Printed no supports, with the base upside down.