That small hole on nail clippers isn’t random—it’s a practical design feature.
It lets you attach the clippers to a keychain or hook so they’re harder to lose, and can also help with grip or organization (like separating fingernail and toenail tools).
Historically, it dates back to older grooming tools in the 19th century that were carried on chains for convenience.
Even though nail clippers have evolved, the hole stayed because it’s simple, useful, and reliable.