Numeroastro Shri Durga Bisa Gold Plated Brass Yantra (8 Cms x 8 Cms) (Pack of 1)-Numeroastro Shri Durga Bisa Gold Plated Big Yantra-Durga Beesa Yantra is regarded as a symbol of power. Persons of all types can use it. Method of Use: Recitation of Hanuman Chalisa 100 times before Bisa Yantra in an auspicious muhurat can free the native from disease. Recitation of Shabar Mantra before Bisa Yantra is capable of waking the powers of this yantra. Worship of Bisa Yantra daily with dhoop-deep can stop bad dreams. Mantra: Om Aing Hring Kling Chaamundaayai Vichchai.