What’s the Hole in a Safety Pin For?

of a spring mechanism. That coil with the hole in it? It’s where the pin’s wire was fastened during the creation process. Consider it the “starting point,” like the wire to be twisted into a tight coil. But there’s more to it than a production leftover — it actually helps keep the spring tension maintained.

Essentially, the hole permits the pin to retain its flexibility with time. It assists in regulating the tension of the coiled cable and helps assure that the pin jumps back into place each time you open and shut it like an expert. The whole structure would