This is version 2 of a small clamp I designed.  I found other uses for the original clamp around my shop and decided I needed something small but a little stronger, more versatile with a movable jaw and still be a fairly quick print.

It has a throat of approximately 1 ¼” and uses a ¼-20 thread size for the adjusting screw.  I printed the adjusting screw with 100% infill.

Please be aware it is a plastic clamp and is not overly strong but can apply a good amount of force for what it is.

A larger C clamp can be found Here.