I have dozens of padlocks at home and always use one when I go to the gym or the public bath. Over time, I’ve noticed a small hole on them, but I never really thought much about it.

That changed when my daughter got curious and asked what the hole was for. I decided to look it up — and the reason was something I never would have guessed…

The tiny hole has a hidden purpose

I think most people have a lock at home – and they’re actually fascinating! Both kids and young adults can find locks intriguing and useful in different situations. Locks aren’t just about keeping things secure; they have a unique design that serves a specific purpose, and they’ve evolved over time to become more advanced and reliable.

It’s interesting to think about how something as simple as a lock can play such an important role in our daily lives, from protecting personal items to ensuring safety in public spaces. There’s also a bit of mystery around how they work, making locks something that sparks curiosity in many people.

So, have you ever noticed a tiny hole next to the keyhole on your lock? It’s easy to overlook, but once you know what it’s for, you’ll never see locks the same way again…

Why is there a small hole in padlocks?

As mentioned, locks are designed to keep our belongings safe, whether on gates, cabinets, or lockers. But when used outdoors — on fences, sheds, or even at the public bath — they’re constantly exposed to rain, humidity, and changing weather conditions.

Over time, this can lead to rust, making the lock stiff and difficult to open.

So, what’s the secret behind those small holes? They’re actually built-in drainage systems! These holes allow water to escape, preventing it from getting trapped inside and causing corrosion. When a padlock is used outdoors, water can eventually seep inside through the holes at the top where the shackle connects.

The small hole at the bottom, known as a weep hole, allows the water to drain out. This helps prevent rust and corrosion that would occur if the lock body simply filled with water. Without them, locks would rust much faster, leaving you struggling to turn the key — or worse, completely locked out.

Another meaning

The weep hole at the bottom of the padlock not only helps drain water, but it can also be used to introduce a small amount of oil into the lock body. Applying oil through the weep hole helps to lubricate the internal components, reducing friction and further protecting against rust and corrosion. This simple maintenance step can keep the lock functioning smoothly and extend its lifespan, especially when exposed to the elements.

So, next time you buy a lock, check for these tiny but essential holes. And if your lock already has one, make sure it’s facing downward after a rainstorm to help drain any water. A simple detail that makes a huge difference!

Not everyone knows about this little lock feature, so feel free to share this article and help your friends learn something new along the way. It’s always great to pass on useful tips that can make life a little easier!