A safety pin is a type of fastening device with a pointed end that tucks into a protective clasp, keeping the sharp tip covered when closed. The clever design lets you pin fabric together without worrying about getting stuck.

Safety pins work like regular straight pins, but with an important improvement: the point locks safely inside a metal guard. This makes them perfect for situations where an exposed needle would be dangerous or inconvenient. You might use a safety pin to fix a torn hem before school, attach a name tag to your shirt at camp, or keep a costume together during a play.

Its spring-loaded clasp and protective sheath solved a problem people had dealt with for thousands of years: how to fasten clothing without constantly pricking yourself.

Today, safety pins serve purposes beyond just pinning fabric. Rock musicians in the 1970s wore them as jewelry to express rebellion. People sometimes attach them to clothing as symbols of solidarity or support for various causes. But mostly, they're just incredibly useful tools that sit in drawers waiting to save the day when a button pops off or a zipper breaks.