This digital Rockwell hardness tester is capable of performing both standard and superficial Rockwell tests. It offers a modern design, full functionality, intuitive operation, and highly stable performance. The conversion value between each hardness scale; The hardness test results can be saved, viewed and printed out, and the maximum, minimum and average values can be automatically calculated According to ISO 6508, ASTM E-18, JIS Z2245, GB/T 230.2