 Opposite the hook-like fretwork on the gangya, exists a curved cavity.It has been suggested that this cavity is representative of the trunk of an elephant, others contend that it is the mouth of the naga (serpent) with the blade being the tail, and still others contend that it is in fact the open mouth of an eagle.Modern tourist kalis blades can be distinguished by a number of features that once identified are quite easy to spot.