What free tool does Nautilus use to extract RAR files?

I have noticed that Nautilus (GNOME Files) can extract some RAR files that cannot be extracted using free packages like unrar-free or file-roller via CLI, nor using GUI tools like Engrampa or Xarchiver. Don’t know why exactly. No passwords involved or anything unusual, just (what seems like) regular RAR files. Maybe different formats? Anyway, I’d like to know what (if any) standalone tool does Nautilus use for extracting RAR files so I could do it myself on the command line. I only use Debian free repositories, so I guess it should be a free package... This is my first question, let me know if I should improve anything. Thanks!!