CHR-150 Rockwell hardness tester Detailed Product Description With economic price and practical usage Don't need the power source Easy and simple to use Main Features: CHR-150 Manual Rockwell Hardness Tester adopted mechanically manual test method, without electrical devices is a popular model Rockwell hardness testers, they have such characteristics as good economic and practical features, widely usage range and simple operation, etc. Usage Range: CHR-150 Manual Rockwell Hardness Tester serves to measure hardness values of hard alloy, carburized steel, quenched steels, hard cast iron, soft copper, aluminum alloy, copper alloy and malleable irons. Technical Specifications: