I designed these parts to hold coins on top surface to polish and engrave. However, this setup can be used for a range of applications due to its flexible pin placement. This setup can hold PCB's for soldering too.
The jaws can be printed in a variety of orientations, though I suggest printing it with the consideration of holes' orientation.
Although this parts can be printed with lower percentages of infill, being a high stress part, I'd suggest full infill, this also enables post printing re-melt and anneal processes.
I included 3D printable pins, but it's not ideal, while holding on quite good and just being a five minute print and thus, easily replicable, I suggest using metal pins with 3mm diameter.
The author marked this model as their own original creation.