Shani Dev is one of the most popular deities that the Hindus pray to ward off evil and remove obstacles. Shani is represented as having a dark complexion and is said to be the son of Surya, the sun god, and Chaya, the servant whom his wife Swarna surrogated. He is the brother of Yama, the god of death and is believed by many to be an avatar of Shiva.
Shani Yantra is used to propitiate an afflicted Saturn and achieve success through complete blessings of Lord Shani. When Saturn is malefic in a horoscope during the transit or causes of Sade Sati, the use of Saturn/ Shani yantra will prove to be very advantageous! It can bring success in worldly affairs, success in business and help you to reach lofty heights. Saturn is the son of Sun god and Chaya (Sanvarna). He is considered as a cruel planet. The cruelty, which he possesses in his sight, is due to the curse he received from his wife. According to the astrology if the Saturn pierces and passes through the constellation of Rohini then it is considered to be very inauspicious and causes draughts for twelve years making even the survival of the living beings impossible.
Shani Yantra/ Saturn Yantra is used to propitiate an afflicted Shani/Saturn and achieve Rajayoga through complete blessings of Shani. When Saturn is malefic in a horoscope, in transit or causes Sadesati, use of Shani yantra is very beneficial. Shani yantra is useful, when one feels depressed. It indicates success in worldly affairs, success in business and the man touches the dizzy heights.
The size of Sri Shani yantra coin card is around 3.5 inches x 2.0 inches.
You can keep this yantra either in your pocket , wallet ,vehicle, house, office or altar place and do the pooja.