A Kubotan is usually attached with a keyring for convenience and concealment, the Kubotan appears as an innocuous key fob to the untrained eye.
Kubatan principal areas for attacks in self-defense include bony, fleshy and nerve targets such as knuckles, forearms, bridge of the nose, shins, stomach, solar plexus, spine, temple, ribs, groin, neck, eyes etc. The Kubotan is usually held in either an icepick (for hammerfist strikes) or forward grip (for stabbing and pressure point attacks). Common uses include hardening the fist (fistload) for punching, attacking vulnerable parts of an assailant's body, and gaining leverage on an assailant's wrist, fingers and joints. With keys attached, it can also function as a flailing weapon.
Kubotan is 5.5 inches (14cm) long and 0.56 inch (1.5 cm) in diameter, slightly thicker or the same size as a marker pen.