Nagabandha Hand Gesture (Mudra)
When both hands held in sarpashirsha hasta is crossed at the wrists, we get the Nagabandha hand gesture.
lets take a look at the viniyoga shloka: (uses)
Etasya viniyogastu nagabandhe he samataha
This gesture is used to show how the snakes twine or their nature of coiling and encircling