Abstract: 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.

Abstract: An announcing system including a message drum with a plurality of listening-recording heads radially spaced around the message drum, each of the listening-recording heads being adapted to traverse a portion of the surface of the message drum, and each of the listening-recording heads having an erase head associated therewith. A master timer is provided, and synchronizing means associated with the message drum provides a synchronizing pulse to maintain proper relationship between the master timer and rotation of the message drum. A control circuit allows a recording station to be selectively connected to the listening-recording heads for recording a message on a message track of the message drum and a subscriber station to be selectively connected to the listening-recording heads for listening to a message that has been recorded on the message drum.