What’s the Hole in a Safety Pin For?

never knew that.

So let’s dig into it. Because this little hole in a safety pin? It’s lowkey genius — and once you know why it’s there, you’ll never not see it.

The Design of the Safety Pin, at a Glance

Before plunging straight into Bafflement Hole, let’s do a rapid-fire rundown of how a safety pin operates, because that gives our world context. At first glance, it looks like a really simple tool — basically a bent piece of wire with a clasp. But it’s so cleverly engineered. This end is sharp (obviously), and the other has this little loop, or