Yantra (called "yan" in Thai) diagrams can be carried on the body in various ways: tattooed on the skin ("sak yan" - สักยันต์); imprinted on a shirt or inner shirt; imprinted on a scarf (, "prajiat") tied round the head, arm, or chest; imprinted on a belt, perhaps made from human skin; imprinted on paper or cloth which is then rolled and plaited into a ring (, "waen phirot"); inscribed on a soft metal such as tin which is coiled round a cord and worn as an amulet (, takrut. The main purpose of these various forms of "yan" designs with Khom inscriptions, is to give invulnerability or protection against various forms of threat.