Why? Are you Canadian and shit?
Shout out Robertson though https://upload.wikimedia.org/wikipedia/commons/f/fe/Robertson_screw.jpg
Never seen one of these in the wild
Lmao no but if you've ever used slotted screws you'll know why
I'm not sure I like Philips better..
Whats wrong with philips? Never had any troubles of i used the right sized bits