Robertson’s efficient manufacturing technique using cold forming for the screw’s head is what made the idea a commercial success, so it looks like Canadian popularized it, even though it was patented by US earlier but not commercially manufactured.
Image source
I’ll add few more here, in case someone wants to know how some of the screw heads mentioned look like.
Good comment to add some more info here. I wasn’t trying to claim superiority of this screw. As an afterthought I figured that adding that additional cut for flathead screwdriver compatibility, could have been helpful with stripped heads recovery. I’m gonna try to buy some of those canadians screws, looks hard to strip.
Don’t forget about other unnoticed tactic, redirecting your attention to something that has nothing do to with the subject, just to make you disregard entire discussion or pay attention to something different. It’s subtle but happening all the time, now you’ll see it everywhere.
LibreTube for watching WC26 at work
Am I the only one who thinks that Material Expressive is less practical than previous UI?
Here you can take a deeper dive into details.