A tiny hole near the clasp of a safety pin may look like an unnecessary detail, but it can be surprisingly useful when sewing or working with fabric. The opening can serve as an anchor point for attaching elastic, ribbon, drawstrings, or cord, giving you better control when threading material through a narrow fabric casing.
To use it, simply thread a piece of string, yarn, or cord through the hole and secure it so it cannot slip out. You can then insert the safety pin into a waistband, sleeve, or other fabric tunnel and guide it through. The attached cord provides extra control and can make it easier to retrieve the pin if it becomes difficult to move through the fabric.
This simple technique can be especially helpful when working with tight or complicated casings. Instead of struggling to grip the safety pin or worrying about losing it inside the fabric, the attached string gives you something additional to hold onto. It is a small trick that can make threading jobs considerably easier.
