Elements of Hindu Iconography v3.c19.6

v3.c19.6

The other yantras are engraved upon thin gold, silver or copper plates, which are rolled into a cylinder and then put into a golden or other metallic case so that they may be worn on the body of person with a view to avoid diseases, possession by devils, and other such evils, which, it is supposed, they have the power to ward off. Occasional worship is also offered to this case containing the magical yantra, and the wearer's faith in its efficacy may well effect cures in many cases.