Kubotan

Ku Gun

The Kubotan (sometimes erroneously spelled as Kubaton or Kobutan) self-defense keychain is a close-quarter self-defense weapon developed by Takayuki Kubota. It is essentially a derivation of the yawara stick, usually 5.5 inches (14 cm) long and 0.56 inch (1.5 cm) in diameter, slightly thicker or the same size as a marker pen. Attached with a keyring for convenience and concealment, the Kubotan appears as an innocuous key fob to the untrained eye, although it may be considered an offensive weapon in some jurisdictions. (source Wikipedia)

Technical information:
- Weight: 126g
- Length: 14cm