Safety pins are one of those everyday objects we rarely stop to think about — yet they’re a masterpiece of simple, clever design. Beyond their familiar look, there’s a small feature many people overlook: the tiny hole near the clasp. While it might seem purely decorative, that little opening serves a surprisingly practical purpose. It’s a perfect reminder that even the simplest tools often hide smart details in plain sight.

The small hole allows a thin thread or cord to pass through, helping the pin stay securely in place when fastened to fabric. This prevents it from slipping or twisting, especially on smooth or delicate materials. For sewing enthusiasts, it adds precision and control, making each stitch or fastening more stable. It’s a tiny detail that turns an ordinary safety pin into a more reliable and thoughtful tool.

But its usefulness doesn’t end there. Crafters often take advantage of the hole to thread multiple pins onto a string, keeping them organized and easy to access during projects. It’s also handy for travelers or DIY lovers who like to keep essentials close — the hole can be used to attach a pin to a lanyard, zipper, or keychain for quick fixes on the go. Small touches like this make everyday tools more versatile than they first appear.

This clever detail shows that great design isn’t always about complexity — it’s about purpose. For generations, safety pins have been trusted for sewing, crafting, and quick repairs. That tiny hole near the clasp, though easily missed, is proof that even the smallest features can make an ordinary item truly ingenious.