This is a small vise I made for a customer several years ago. She needed a way of holding small acrylic circles precisely so she could epoxy them and paint them. This is what I came up with. The 2 main bodies sandwich all of the components together.

The screw must be put in-between the left and right head pieces, then the faceplate must be slid into place, and then finally the left and right body can be put together. Glue is recommended but not required.

I recommend printing the screw with as durable a material as possible, I have used PETG and alloy910 from taulman with great success.