What’s the Hole in a Safety Pin For?

test of time. And that’s in part thanks to the sort of small design details like those in a hole in a safety pin. It’s one of those “you don’t see it until you really see it” type of things.

Makes you think about how many more common tools have hidden features we never knew about, right? Like the hole in the pot handle (yup, that’s for your spoon), or that little groove you see at the bottom of plastic bottles (pressure control!). Engineering is truly lowkey amazing.

The Hole’s There for a Reason

If you’ve read this far, congrats;