What’s the Hole in a Safety Pin For?
That small hole or loop at the end of a safety pin is not just a decorative feature—it has an important purpose in the design.
1. It Helps Hold the Pin Securely
The hole is part of the coil mechanism that gives the safety pin its spring action. When you open and close the pin, the coiled section helps provide tension, allowing the sharp point to snap back into the protective clasp.
Without this spring-like design, the pin would not stay closed properly.
2. It Makes the Safety Pin Stronger
The coiled end helps distribute pressure when the pin is bent open. This reduces stress on the metal and allows the pin to flex repeatedly without breaking easily.
3. It Can Be Used for Attachment
On some types of safety pins, the looped end can also be useful for:
- Attaching the pin to a keyring or chain
- Holding small charms or decorations
- Creating craft items or jewellery
4. It Improves Safety
The design of the coil and clasp helps keep the sharp point covered when the pin is closed, reducing the chance of accidental pricks.
5. It Helps During Manufacturing
The coiled loop is created when the metal wire is shaped into the familiar safety pin design. It provides the correct spring tension and allows the pin to be produced efficiently.
Fun Fact: Safety Pins Have Been Around for Nearly 200 Years
The modern safety pin was patented in 1849 by Walter Hunt, an American inventor. His design used a coiled spring mechanism and a clasp to cover the sharp end—features that remain in use today.
