This superior triple strength hematite magnetic bracelet is made of crushed hematite formed into ceramic hematite beads. It provides very good magnetic therapy. Our magnetic bracelets are strung on .8mm copolymer and have a 5000 Gauss Gun Metal epoxy magnetic clasp. Magnetic bracelets are the strongest treatment for hand, wrist, elbow and shoulder on the arm they are worn. However they will often help neck, back and knees. Determine magnetic bracelet size by measuring the circumference of the wrist and adding 3/4 inches.