The safety pin is often credited as one of the most practical small inventions in everyday life. Its design hasn’t changed much over the decades — and that’s because it works.
The tiny hole near the clasp is a perfect example of thoughtful engineering. It adds extra function without adding complexity or cost. Most people never use it — or even notice it — but once you understand its purpose, you start to appreciate how cleverly designed it really is.
Next time you grab a safety pin, take a closer look. That tiny detail isn’t an accident. It’s a quiet reminder that even the simplest objects can hide smart, practical design features in plain sight
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