Wago level connectors

[Demon Cleaner]

I didn't know the ones with the little lock, but the other ones, without screws, I'm using since 15 years or so. So what's so special about them?

You don't need any tools (other than a wire stripper) and they are reusable.

Like I said, have been using this kind of connectors since 15 years, they have always been available here.