How do they cut the slots in the top of Phillips Head screws?
Some screws are cast with the “cross-top” and others are forged to have the “cross” recess.
On the other hand it could be elves with chisels and hammers.
–Kalél
Common ¢ for all ages…
“Well, there was that thing with the Cheese-Wiz…but I’m feeling much better now!” – John Astin, Night Court
“If ignorance is bliss, you must be orgasmic.”
But that’s so obvious! Actually, I prefer the elf theory.