Set-screw Marr? How the hell are those even legal anywhere, they are unusable without getting electrocuted when connecting them. Screw-on insulator cap? You are giving me the shivers...

If you need something with a screw, use https://de.wikipedia.org/wiki/L%C3%BCsterklemme#/media/Datei...

But almost always, really really, use Wago 221 (preferred) or Wago 2273. You won't want anything else anymore.