holds the conch or Sankha. The second hand of Vishnu holds the disc or Vaijra. The third hand of Vishnu holds the club and in the fourth hand Vishnu holds the lotus or Padma. Vishnu also has a bow called Sarnga and a sword called Nandaka.
Most of the time, good and evil forces are evenly matched in the world. But at times, the balance is destroyed and evil demons get the upper hand. Often in response to a request by the other gods, Vishnu then incarnates in a human form to set the balance right again. 9 Vishnu incarnations are generally recognized as Vishnu avatars, even though some sources also see other important figures of the indian epics as incarnations of Vishnu.