Thought It Was Only For Decoration
If you thought the hole was simply… there, you’re not alone. It doesn’t look functional. It’s little, discreet, and if you’re not a mechanical engineer or inclined to question everything, you probably never did. The design is minimalist to the point that it’s easy to not realize how much thought went into it.
Plus, it’s not as if the packaging has a tag saying, “Hey! This is for tension control!” The way most of us do is rip open a pack of safety pins and go to pinning.
