Secret Button on a Seat Belt and 25 Things with Hidden Purposes

From those rivets on your jeans to the doorknobs you touch every day, from the extra drawer under your oven to the hole in the elevator door... each object we see or use every day has a story to tell. Most of the everyday items have secrets many of us fail to notice.
Here're 26 things you use every day that have hidden purposes. I'm gonna explain why your car seatbelt has that strange button that seems absolutely useless. It's not a random element of design! It's an element of safety as it's there to ensure your buckle will always remain at the end