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Have you ever noticed a small hole in everyday objects and wondered about its purpose? Whether it’s on a pen cap, a padlock, or even an appliance, these tiny holes often go unnoticed. However, they serve essential purposes that many people are still unaware of. Let’s uncover the mystery behind some of these small yet ingenious designs.
1. The Small Hole on a Pen Cap
One of the most common yet overlooked small holes is found on pen caps. Its purpose? Safety.
- The hole is designed to prevent suffocation if the cap is accidentally swallowed. It allows air to pass through, reducing the risk of choking.
- This safety feature has become a standard in pen manufacturing and has likely saved countless lives.
2. The Small Hole on Padlocks
Padlocks often have a tiny hole near the bottom. This hole is there for maintenance and functionality.
- It allows water to drain out if the lock is used outdoors, preventing rust and damage.
- The hole also lets you apply lubricant, ensuring the lock mechanism stays smooth and functional.
3. The Small Hole in Airplane Windows
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