Summary

Tool for easily drilling polymer clay beads from 5 to 13 mm (1 mm steps).

Place the polymer clay bead in the corresponding diameter slot, cover with the top, and pierce the bead with a needle or, better yet, a drill bit.

The hand drill in the photo is https://www.thingiverse.com/thing:2094564

A template with the dimensions to be glued on the top is now available, suitable for all versions.