Is Robertson the same as square head? It looks like Robertson has a slight taper?

Pocket hole screws are typically square and I find them inferior to torx.

I’ve been on Lemmy for over a year, where I learned that there’s some difference between liberals and leftists, though what those are, I don’t know.  I also had never heard the term tankie before Lemmy.  I’ve never cared to look any of these terms up though.  Probably makes me one of them…

Top one is incorrect. Z needs to point outwards.