4. Ever noticed a little hole in the bottom of a padlock
The light hole at bottom of the padlock ought to have some reason and you must know it. The hole present at the bottom has been intentionally manufactured only to let excess dirt and water pass through them and this is not the only reason, it is also helpful in lubrication purpose.
5. Why is one side of a bobby pin bent into a zigzag?
There are also some bobby pins which don’t have this zigzag structure and that’s the reason those Bobby pins are unsuccessful in holding the hair properly. The zigzag structure of the bobby pins is only to get a better hold on the hair for longer period of time.