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What is this tiny hole really for?
When making a safety pin, the spring—the spiral that gives it its flexibility—must be wound with extreme precision around the pin. This requires a stable anchor point.
That’s where that tiny hole comes in. It allows machines to guide the wire as it winds, calibrates the spring tension, and ensures the pin stays in place, opening after opening. The result? A reliable closure, lasting elasticity, and longevity that lasts , even after years of use.
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