KATGI Premium Crafted Brazil Hematite Steel Magnetic Energy Black Stone Therapy Bracelet (MEN) Limited Edition Tungsten Steel Premium Crafted Brazil Hematite Steel Magnetic Energy Black Stone Therapy Bracelet - Relax Muscles and Blood Circulation (MEN) Anti-bacterial, no rust, wear allergies to help relax muscles Positive and negative potential to eliminate electromagnetic waves Balance the body positive and negative potentials Hassle-free return & exchange policy. Satisfaction guarantee