Bāṇa (arrow): the three fingers joined just touch the thumb, and the little finger is extended.
the number six, Nala-nrtya.
When the three fingers i.e. forefinger, middle finger and ring finger are joined together and slightly pressed by the thumb and the little finger is outstretched, it becomes Bana hasta (bāna = arrow).
Bāna hasta is used to denote the number six and Nåla nrtya.