Navagraha Yantra, just like Navagraha Mantra, is used to eliminate defects  and Doshas located in the horoscope. Along with this, yantras are used to worship goddesses and gods in order to attain auspicious results. These are displayed in a symmetrical frame on a dried bark or bhojpatra, paper or any plain surface during the auspicious time of every planet. These yantras contain immense powers. Some yantra are primary designed with lines, shapes and numbers as well. In some cases, beej words are also used; as the Beejakshara (beej word) is claimed to be one whole yantra.