Kubotan Polypropylene Keychain
The Kubotan keychain was originally based on a small bamboo weapon called the "hashi stick", an invention by Kubota's father Denjiro. Its popularity grew in 1969 to 1970s when Kubota, at the request of Senator Edward Davis, created the weapon and began training female officers in its application. It is often touted as extremely effective in breaking the will of unruly suspects with painful locks and pressure point strikes. Because of this, the Kubotan is also sometimes dubbed the 'instrument of attitude adjustment'.