... .Automatically load test force 4.CE Electric Rockwell Hardness Tester Model HR-150DT HR-150DT electric Rockwell hardness tester with simple operation ... and bearing steel. Digital screen: Specifications Models HR-150DT Rockwell Scales HRA,HRB,HRC,HRD,HRE,HRF,HRG,HRH,HRKInitial Testing ... by CE certificate.4. One year warranty. Certificate: About us: Electric Rockwell Hardness Tester HR-150DT