In vedic astrology Shani is considered as the God of Judgement who affect the life of people based on their " Karma " or deeds. So people simply tremble by the name of Shani Dev because they are afraid of result of their unlawful deeds. When any person is going through Shani Dasha or Mahadasha or Dhaiya or Sade Sati Shani's effect is heightened and they have to face many difficulties, troubles and tragedy in their life. In such cases people are advised to please Shani Dev by worshiping him. Then comes Shani Yantra which is used to appease Shani Dev and nullify his ill effects.This Yantra nullify and neutralize the effect of Shani Dev. It has spiritual benefits on its users and brings worldly gain and help them to succeed in their life.