Video Description:
Tape measures are one of the most common tools in the world, but have you ever wondered why the metal blade is curved instead of flat? It turns out that this simple design feature is the key to making tape measures strong, practical, and easy to use.
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Who knew. And it makes perfect sense. It's like Goldilocks and the Three Bears. Finally, the porridge that was just right. Not too much. Not too little. Ta da.