That tiny round hole at the end of standard nail clippers isn’t decorative, nor is it a manufacturing defect. Its primary, intended purpose is to allow you to attach the clippers to a keychain, lanyard, or a travel toiletry bag so they don’t get lost.
Because nail clippers are small, easily misplaced items that tend to vanish into bathroom drawers or travel bags, that loop was designed to anchor them down. Historically, many older iterations and pocket-knife style sets even came with a small metal chain threaded right through it.
(Fun bonus fact: On certain manufacturing assembly lines, that exact same hole also doubles as the alignment point where a pivot pin holds the metal lever and base securely together during construction.)
