🔍 Look Closely at a Safety Pin
Most people use a safety pin without ever noticing the small round hole near the coiled end—but it actually has a clever purpose.
⚙️ 1. It Helps the Pin Stay Strong and Flexible
That little hole is part of the spring (coil) mechanism.
It allows the metal to bend and return to its original shape
Prevents the pin from snapping or losing tension
👉 Without it, the pin wouldn’t open and close smoothly
🔒 2. Keeps the Pin Securely Locked
The design ensures the sharp end stays firmly in place
Reduces the risk of the pin accidentally opening
👉 This is what makes it a “safety” pin
🛠️ 3. Helps During Manufacturing
The hole and coil design make it easier to shape the metal
Ensures consistent size and durability
💡 Bonus: A Tiny Multi-Use Feature
Some people even use that small opening to:
Attach thread or string
Connect multiple pins together