Henry Phillips received a patent for his screwdriver and screws on this day in 1936, as Randy Alfred summarizes. The fastener and tool were designed with power tools and automated assembly lines in mind, and indeed General Motors adopted the system for the 1936 Cadillac. Supposedly it’s harder to overtorque a Phillips screw.

The Phillips cam-out—when you’ve gone far enough and the tool pops out of the screw—has led to plenty of workshop profanity. And loosening a machine-driven Phillips screw with a hand-held screwdriver has apparently reminded many, judging from their language, of the tenacity of a female dog protecting its newborns.

Still, remember Henry Phillips gently. His screws are holding your life together.

Not to mention your set.