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

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

It’s one of those everyday details most people notice at some point but rarely question: the tiny hole at the end of a safety pin. It seems too small to matter—yet it’s there on purpose. In fact, that little hole plays several important roles in how a safety pin works.

Here’s why it exists and how it’s been quietly helping for over a century.

A Key Part of the Locking Mechanism

The tiny hole is part of the safety pin’s spring and locking system. When the pin is formed, the metal wire is tightly coiled to create tension. The hole helps:

• Secure the pointed end in place
• Keep the pin from accidentally opening
• Maintain steady pressure so it stays closed

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