Read full article in comments What’s the Purpose of That Tiny Hole in a Safety Pin?
Safety pins are one of those everyday household items that almost everyone has used at some point, yet very few people stop to look closely at how they are designed. From quick clothing fixes to sewing emergencies and DIY hacks, the safety pin is one of the simplest tools ever created. But there is one small detail that often leaves people curious: the tiny hole built into the pin. At first glance, it may seem purely decorative or even like a manufacturing quirk, but that little opening actually plays an important role in how the safety pin works. Once you understand its purpose, it suddenly makes perfect sense why it has been part of the design for so long. Safety pins rely on a spring-and-clasp mechanism that keeps the sharp tip locked in place, and small structural details are essential to that function.
It Helps the Spring Mechanism Work Properly
