The naag nagin joda potentiality by kalsarpa (Rahu and ketu) mantra. This joda is also beneficial for those who are suffering from kaal sarp dosh. Nag nagin ka joda is very useful for removing evil effects and protects you from such harmful evil eye. This is used for kaal sarpa puja. This naag nagin joda is also placed in the foundation of the building in the vastu pooja at the time of starting construction, and it is believed that it supports long life of the building.