FEATURES:
- STEEL: JAPANESE 440C COBALT STEEL
- HARDNESS: 59-61 ROCKWELL
- IDEAL FOR WET AND DRY HAIRS
- OFFSET DESIGNED HANDLE OFFERS THE MOST COMFORT AND CONTROL.
- 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
