[Lee Stewart]

At a certain point in our lives, we’ve all used a padlock for one reason or another. You may or may not have noticed that there’s a little hole, sometimes two, at the bottom of the padlock. These holes actually serve two important purposes for the lock itself. First, they allow any water that gets inside to drain out of the lock. Often times, locks are used outside, so they have to be prepared to handle the elements. If water couldn’t drain out and it ended up freezing, the lock would suffer some serious damage since water expands when it freezes. Second, the holes allow you to pour oil or WD-40 into the lock in case it gets jammed and won’t open up. Without the hole for pouring oil, once the lock became stuck, it’d be useless.