Like the other kobudo weapons, tonfa was used as a working tool, before being
a weapon. The tonfa was an arm of a millstone for preparing grain, which could
easily be removed.
The main part of the tonfa, the shaft, consists of a large hardwood body, about
50 to 60 centimetres in length, and a smaller cylindrical grip secured at a 90
degrees angle to the shaft, about 15 centimetres from one end.