A padlock is one of those everyday items we don’t think about much—until we need it. People use them to secure bikes, garden sheds, toolboxes, gates, and more. They’re made to withstand harsh weather and attempts to cut or break them.
But many people never notice one small but very important detail: the tiny hole at the bottom of most padlocks.
And yes—it serves a major purpose.
A Small Hole With a Big Job
Padlocks are durable, but like most metal items, they’re not invincible. Rain, snow, moisture, and humidity can cause rust and internal damage over time.
That’s where the small mystery hole comes in.
Preventing Rust and Water Damage
The hole is actually a drainage system. If water gets inside the padlock, the hole allows it to escape. This keeps the inner mechanisms dry, prevents corrosion, and extends the life of the lock.
It’s a tiny feature that makes a big difference.
Another Function You Might Not Know
Sometimes, padlocks get jammed—even when you have the right key or code. Weather, dirt, or age can make them stick.
A Spot for Lubrication
That tiny bottom hole is also designed so you can add synthetic lubricant directly into the lock’s internal components.
A quick spray of lubricant through that hole can often unstick a stubborn lock instantly.
