98% of people don’t know what a safety pin hole is for.

The safety pin, also known as a safety pin , is one of those small objects we all have at home, but few stop to look at closely. It’s used to hold up clothes, fix torn garments, or improvise last-minute solutions. However, there’s one detail most people overlook: that tiny hole in the spring portion .
Although it seems like a simple aesthetic design, it actually serves a key function that few people know about. And if you’ve ever wondered why it’s there, you’ll be surprised to discover its purpose and some of the sewing tricks our grandmothers used with these modest but ingenious objects.
Grandma’s Sewing Tricks
Grandmothers were true masters of sewing, capable of mending any garment with ingenuity and patience. Their methods, though simple, were highly effective, and many are still used today:
Threading the Elastic with a Safety Pin
This classic trick never fails. To change or adjust elastic, simply hook one end of the elastic to the safety pin and slide it through the garment’s channel. It makes work easier and prevents the elastic from twisting or getting lost inside the fabric.
Prevent Thread Tangling:

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