Editorial Review Features: - STEEL: JAPANESE 440C COBALT STEEL.- HARDNESS: 59-61 ROCKWELL- IDEAL FOR WET AND DRY HAIRS- THIS EROGONOMIC DESIGNED HANDLE RELIEVES STESS ON BOTH SHOULDER AND WRIST.- LIFETIME WARRANTY Rockwell: Rockwell hardness testing is a general method for measuring the hardness of metallic materials. In this test, a load is applied to set a diamond cone or a hardened steel ball in the surface of the metal. The hardness is measures by depth of the penetration
Features 1) STEEL: JAPANESE 440C COBALT STEEL. 2) HARDNESS: 59-61 ROCKWELL 3) IDEAL FOR WET AND DRY HAIRS 4) THIS EROGONOMIC DESIGNED HANDLE RELIEVES STESS ON BOTH SHOULDER AND WRIST. 5) LIFETIME WARRANTY