Shani Yantra is very ctive to remove the malefic ct of Saturn & help spiritually. 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/Saturn Yantra is useful, when one feels depressed. It indicates sucess in wordly affairs, success in business and the man touches the dizzy heights. Shani yantra/Saturn Yantra is embossed on copper plate and is kept on rising moon Saturday during venus or Saturn Hora.