Nunchaku
 A nunchaku-type material arts self-defense weaponry having swivel bearings connecting opposite ends of a link chain to a pair of handles. The swivel connections allow continuous twisting or spinning of the handles relative to each other during use of the device without twisting or kinking the link chain. 
Y Y Y F
Y10T Y10T Y10T F41B
additional additional additional inventional
Jack E.
Lewis