 The iron weight could have spikes and its shape could be round or be multi sided.Its origin is not clearly known.Chigiriki belong to the "furi-zue" family of weapons (brandishing-sticks) which was any type of stick or staff with a chain attached and it is also one of the "shinobi zue" weapons (concealed staffs and canes), "shinobi zue" were often hollow and had multiple uses such as hiding other weapons such as shuriken or as a blow gun or a breathing tube.