Remixed with smoothed geometry (no more manifold or overlapping faces), fixed the flat areas and added a bevel to make the print more ergonomic. Only redid the round clamp at the moment.

Link to original: https://www.thingiverse.com/thing:677020

From the original :
These clips are a variation on other clips using clothes pin springs. http://www.thingiverse.com/thing:307551 http://www.thingiverse.com/thing:680130 I designed these as gluing clamps, for small parts in need of moderate but firm pressure. The curved shape has a good reach, opens pretty wide and goes over obstructions. The flat half is handy for use in tight spaces. They all open about 2" (50mm) and have a ~2 inch depth. Metric and SAE files are included, as your printer may require... Individual half pieces take ~12 minutes, ~7 grams ABS using Afinia defaults.