98% of People Don’t Know What the Hole in a Safety Pin Is For

If you’ve ever used a safety pin, you may have noticed something curious: a small, almost imperceptible hole near the head of the pin. At first glance, it looks like a minor imperfection, a manufacturing quirk, or even something purely decorative. But this tiny hole is far from accidental. It is part of a clever design that has been refined over more than a century, serving multiple practical purposes.

Let’s take a closer look at the history, mechanics, and utility of this small but surprisingly important feature.

A Brief History of the Safety Pin
The modern safety pin was invented in 1849 by Walter Hunt, an American mechanic. He designed it as a simple, reusable fastener that could securely hold fabric together without pricking the user’s fingers.

Hunt’s design included: