Everyday things that you have been using wrong

That Tiny Hole On Elevator Doors

How you’re using it: Have no clue

If you have even been inside an elevator, you will see that there is always a tiny hole on one side of the door. Have you ever wondered what the use of these holes is? As you may have already guessed, they serve a specific purpose. It is there for authorized personnel for them to enter the elevators safely. These are not peep -holes to see what’s inside the lift.