small details of its design. Specifically, the little hole nestled at the base of its coil. I had assumed it was purely decorative, a quirk in an otherwise simple tool. Turns out, that tiny hole is anything but ornamental. It’s a small marvel of engineering, cleverly integrated to serve a purpose that makes the safety pin far more functional than most of us realize. And if you’re like me—like most humans—you probably never knew about it.
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Let’s explore this often-overlooked detail and understand how something
