That tiny hole on the end of a standard nail clipper has a couple of very practical purposes:
* **Keychain Attachment:** Its primary design purpose is to let you thread a small split-ring, lanyard, or chain through it. This makes it easy to clip onto a key ring, zipper pull, or travel toiletry bag so you don’t lose it.
* **Manufacturing Hold:** During the assembly process of traditional lever-style clippers, that hole is frequently used to help hold or anchor the components in place while the metal is punched, stamped, or pinned.
While people have come up with plenty of clever internet hacks for it over the years, portability and manufacturing are its main jobs!
