My take on this simple PCB vice.
I had a piece of 10 mm aluminium pipe laying around so I used it for guiding rods.
The end pieces should be of tight fit but I had to use few drops of superglue.
Jaws are pulled together with rubber band, secured in place with a piece of filament.
Easy print on Prusa i3.
I am adding the scad file so you can adjust the diameters.