Part 3: 4 Key Reasons Safety Pins Have a Coiled Loop

• Spring Tension: The coil acts as a torsion spring, providing the constant outward pressure needed to keep the sharp pin securely inside the clasp.
• Flexibility & Durability: Without the loop, bending a straight piece of wire back and forth would rapidly cause metal fatigue and snap the pin.
• Manufacturing Efficiency: Coiling a single piece of spring wire is far cheaper and more structurally sound than assembling multiple separate hinges or joints.
• Uniform Stress Distribution: The circular loop distributes mechanical strain across the entire curve rather than concentrating force at a single weak bend point.

➡️ TAP “NEXT” TO LEARN HOW TO USE THE LOOP FOR HACKS IN PART 4!