Most people use nail clippers every day without noticing a small detail on them.
That tiny hole on the metal lever looks random, but it actually has a long design history.

At first, it seems like decoration or a manufacturing flaw.
But it was actually created for practical reasons over 100 years ago.

The hole originally helped people attach the clipper to chains or keyrings.
This made it easier to carry before bags and modern storage were common.

Over time, it stayed in the design because it still proved useful.
Manufacturers also found it helpful during production and handling.

It even adds slight ergonomic support when extra pressure is needed.
Especially for thicker nails where grip and control matter more.

What looks like a useless tiny hole actually carries a hidden century of engineering decisions.
But the real reason it survived all these years is even more surprising than you think…