What’s the Purpose of That Tiny Hole in a Safety Pin?

What’s the Purpose of That Tiny Hole in a Safety Pin?

At first glance, a safety pin looks like one of the simplest tools ever invented—a sharp point, a clasp, and a spring. But if you’ve ever looked closely, you may have noticed a tiny hole at the end of the pin near the clasp. It’s so small that most people never give it a second thought. Surprisingly, that little hole plays an important role in how a safety pin works.

It Helps Control Tension

The tiny hole is part of the safety pin’s spring mechanism. When the wire is coiled to create tension, the hole helps anchor the end of the wire securely. This allows the pin to maintain consistent pressure, keeping it tightly closed once fastened. Without this feature, the pin could loosen more easily and fail to stay shut.

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