MatthiasWandel | A square drill for round holes @matthiaswandel | Uploaded 4 years ago | Updated 4 days ago
A hand-operated drill designed for jigging things up.
http://woodgears.ca/drill/square.html

Google translation of polish language website:
translate.google.ca/translate?tl=en&u=wiertarkaiskra.pl

Polish demonstration video and website:
youtu.be/nP7dmvqJvOw
https://www.wiertarkaiskra.pl

The fasteners are from "ITALIANA ferramenta". The right angle geared one is "Target J10"