Model Painting Tongs - Simple
Print two of these and connect together with paperclip wire for the pivot, and a rubber-band for tension. Simply move the rubber-band to a higher groove to make it a tighter grip.
I printed mine with 33% infill and 0.4mm resolution.
You can scale them as a pair in any direction, but keep in mind the pivot bore is 2.2mm diameter.
I designed these as an alternative to buying a "professional" version for $25. For 30¢ they're good enough! Plus I can use them while primer spraying without feeling guilty.
License: Creative Commons, Attribution, Non-Commercial, No Derivatives