Summary

This is a refinement of the project https://www.thingiverse.com/make:364411
Spring changed for more stronger jaws. It is recommended to print the spring from PET-G with 100% infill density and high temperature (250°C) so that the material is not be brittle. For the main part of the clip a different, harder material is recommended, for example PLA, and 100% infill also. The project of a spring on FreeCad is attached.