It is a kind of club, made of bone of forearm or leg, sometimes of wood and metal. It is a magic wand held by tantric deities, Dakinis and Vajrayana saints. It is generally surmounted either by Vajra or Kapala or the Trishula or the banner or all of them. In any case for a Khatwanga the skulls are necessary and it will be so called even if nothing else in present.