KATGI Tungsten Steel Brazil Hematite Steel Magnetic Energy Black Stone Therapy Chain Bracelet (MEN) Limited Edition Austrian Crystals Tungsten Steel Premium Crafted Brazil Hematite Steel Magnetic Energy Black Stone Therapy Chain 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