A padlock is one of those everyday objects we barely notice, quietly securing sheds, bikes, gates, and toolboxes. We twist a key, hear the click, and move on. But if you look closely at the bottom of a padlock, you’ll see a tiny hole—easy to miss, yet essential to the lock’s function.
Padlocks endure rain, heat, snow, and humidity. Because they’re made of metal, moisture that seeps inside can cause rust and corrosion, eventually jamming the internal parts. The small hole provides a drainage point, allowing trapped water to escape and preventing long-term damage.
But the hole serves another purpose. Over time, dirt, grit, or cold weather can make a lock stiff or stuck. The opening allows lubricants like graphite powder or lock oil to reach the internal tumblers. A few drops through the hole can loosen the pins and restore smooth movement—saving a lock that might otherwise be cut off.
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