Everything You'd Want to Know About Screws
Instructable user arcticpenguin unraveled the myst... ...rcticpenguin unraveled the mystery behind various screw types (what? You think that there are only Phillips and slotted screws ?). Take for example, the history of the Phillips screw...
https://www.neatorama.com/2009/01/04/everything-youd-want-to-know-about-screws/
