This Yantra is made of copper in the shape of Hindi four and 40rt Gomedh is affixed into it. You need to take an iron bowl and fill it with mustard oil and then immerse the Yantra into the bowl on a Saturday. Then on next Saturday pour the oil in a peepal tree take a black cloth 1.25 meters and wrap 1.25kg black urad, 1.25 kg black til and place the Rahu Yantra and the iron bowl in it. Then before 12 Noon it should be denoted to holy flowing water with complete devotion. This paanch mahadan is said to reduce the evil effects of Rahu which are caused due to its placement, dasha, antardasha or transit.
There is an ancient Hindu tradition that donations are given in Holy running water to ward off the evil effects of malefic planets. the ancient puranas like Agnipurana and Matsya purana deal with the donations of Rattan Jadhit Yantra (Gem studded yantra) to ward of evil and propitiate good in life. If regularly done especially near's birthday and then repeated quarterly this brings excellent results. These donations have to be made in such manner that you donate five articles at a time. This is known as PANCH MAHADAN. (The Gems used for making these Yantras are not of very high quality but original.)
These Yantras have been empowered with special Vedic mantras and Yogic Pran Pratishta by Sh. Pankaj Khanna himself.
Yantra is the Sanskrit word which means an instrument or a machine. In Tantric texts and Bhramanical Texts it means Visual Mantras or in easy words mantras made in geometrical figures and colours to influence the environment, cosmic forces, spirits around us, the evil eye of our enemies and our own aura and mental makeup. In Hindu and Buddhist mysticism this kind of geometric forms known as Yantra in Hindus and Thangka Paintings or simply Thangka in Buddhist areas is widely seen in Temples, monasteries, Homes and Viharas.