When working with small models sometimes my fingers just are too big. So I made a fully printable hand vise.

To clamp something you simply turn the handle.

Print everything with a layer height of 0.2mm or lower. Support is not needed. The thread is close to M12 and should work directly after printing. You can lubricate the thread with candle wax so it runs smoother.
For the hinges I designed hinge rivets. Install the claws to the claw-bridge then insert the rivets. Heat up a flat piece of metal (e.g. a flat screwdriver) and press it on the small end of the rivet. The rivet will melt in place.

Disclaimer:
This work by blecheimer is licensed under CC BY-NC-SA 4.0
You are not allowed to copy this model to other 3D printing websites without my permission.