who love a little mechanical insight, the role of this hole is even more fascinating. Modern safety pins are produced using machines that shape the metal wire into a consistent, precise form. During this process, the hole functions as a guide, holding the wire in the correct position as it’s twisted into the coil. Without this anchor point, the manufacturing process would be far less reliable.
The hole also ensures uniformity across batches. Each safety pin, regardless of size or color, relies on this detail to maintain consistent tension. Without
