Most of us use everyday tools on autopilot. We brush our teeth, turn door handles, open jars, clip our nails — all without thinking twice. These objects are so familiar that we rarely question how they work or why they’re shaped the way they are.
Take the humble nail clipper.
It’s small, inexpensive, and found in almost every household. You might keep one in your bathroom drawer, your purse, or your travel bag. You’ve probably used it thousands of times. Yet very few people stop to notice one tiny detail: the small round hole at the end of the clipper’s handle.
