Introduction:
The little hole in the padlock that we usually ignore has its hidden function that many people have no idea about. Although padlocks are relatively simple in their design, this small feature hides an interesting secret that can prove extremely helpful in many situations. In this article, we’ll discover what this small hole is really for and how to use its potential.

Ingredients:
Padlock with a small hole (usually with a key, e.g. for a bicycle, cabinet or gate)
Clean tissue or cloth
A little oil or grease for the mechanism
How to cook: