Why there is an arrow on your car’s fuel gauge
Car manufacturers added this little arrow for drivers to know which side of the car their gas tank lid is without looking from outside. It’s very convenient if you’ve just bought a new car or borrowed your friend’s car. However, not all cars have this feature.
What rivets on jeans pockets are for
Why staplers have this part
In its “normal” mode, a stapler bonds papers with staples on the inside. If you turn the silvery platform 180 degrees, though, staples will bend to the outside, making it easy to take them out if needed without hurting your fingers and also saving the papers.
How to find out if your phone is wet inside
Many batteries have this special moisture indicator that looks like a little square or a circle, and it changes color from light to red if it’s wet.https://goo.gl/9XYzaE
Why there are small bumps on the F and J keys
They’re helpful when you type using the touch method with ten fingers. These keys are “anchors” — you put your index fingers on them. https://goo.gl/lGVV3C