The "little round hole" of the nail clipper has special and powerful uses

Keychain Attachment: "We can put the key ring into the small hole", which allows the nail clipper to hang securely. This ensures that you will not lose the nail clipper unless the entire key ring is lost. Wire
Bending: Insert a wire into the small round hole to easily bend it. "You only need a small amount of force", which is safer than using your fingers.
Screwdriver Alternative: