A padlock is a simple tool with an important job. People rely on them for bikes, sheds, lockers, toolboxes, and gates. They are made to handle harsh weather and resist attempts to break or cut them. Still, there is a small feature many people overlook — a tiny hole on the underside that has a very specific purpose.
A Feature With a Real Function
Using a padlock is one of the most reliable ways to protect your belongings. Though durable, they are made of metal, which means they can rust when exposed to rain or extreme temperatures. Thankfully, most padlocks include a small hole at the bottom that lets trapped water drain out. This simple design choice prevents corrosion and helps the lock last longer.
A Modern Alternative to the Padlock Hole
While this little drainage hole was once essential, weather-resistant padlocks now exist as well. These versions are built to endure year-round outdoor conditions, continuing to keep your property secure without relying solely on the tiny drainage opening.
Another Purpose Behind the Hole
Beyond preventing rust, the small opening at the bottom of a padlock serves one more practical role. If a padlock becomes jammed or refuses to open even with the right key or code, lubricant can be applied through that hole. This helps loosen the internal mechanisms and allows the lock to open again.
Everyday Items With Their Own Hidden Features
Padlocks aren’t the only everyday tools with built-in features that people often overlook. Many common items were designed with more than one function in mind.
Screwdrivers Can Work With Wrenches
Automotive work often involves tight spaces that are hard to reach. Interestingly, many screwdrivers can fit into a wrench, allowing mechanics to turn screws in cramped areas with better leverage.
Why Clothes Used to Come With a Fabric Swatch
Clothing often included a small fabric sample. Some garments still do. The swatch serves two purposes. It helps people match the fabric if repairs are needed and also allows them to test products like detergent to see how they affect the color. The swatch acts as a trial piece so owners know how to care for the clothing without damaging it.
Why Brass Is Used for Padlocks and Doorknobs
Brass has natural anti-bacterial properties, making it a common choice for items people touch often, such as doorknobs, handrails, and some padlocks.
The Hidden Gas Tank Reminder in Your Car
Many drivers forget which side of the car their gas tank is on. To help, manufacturers added a small indicator near the fuel gauge. The arrow points to the correct side of the vehicle.
Logos With Dual Purposes
The “57” on Heinz bottles isn’t just part of the branding. It also marks the best place to tap the bottle so the sauce flows smoothly.
Padlocks — and the other items mentioned above — are just a few examples of how everyday objects are cleverly designed to make our routines easier and more convenient.