Your padlocks have extra holes for drainage.
Aside from the lock itself, the extra little hole is crucial. Surprisingly, it also serves as a drain for any padlock you may be utilized outside. That is to say, your lock will not corrode, freeze, and eventually, shatter. It will be in excellent condition for all of the elements it will encounter while performing its duties outside.
It can also be used to lubricate your lock. There’s no need to irritate your ears with obnoxious squeaky noises! To cut a long story short, that extra small hole is intended to ensure that your padlock is always functional.