... Rockwell hardness tester (HRS-150D) Main function and features:1. It adopts big LCD, indicating the hardness value directly, conversion hardness value, test force, dwell time ... 588N), 100Kg (980N), 150Kg (1471N)Hardness data readBig LCD digitalConversion scaleSuperficial Rockwell, Brinell and VickersData OutputBuilt-in printerDwell ... engineers.Provide 1 year warranty. Rockwell hardness tester HRS-150D