Hardness Tester ISO 6508 ASTM E18 Scales HRA HRB HRC HRD HRE HRF HRG HRH HRK Measuring Range 98N/10kgf Resolution 0.1 HR Indenter Ball Diamond Work Surface Depth (In.) 6 1/2 in Max Workpiece Height (In.) 6 11/16 in USB Output Features Automatic Power Off Convert to HV or HB Automatically Digital Display Low and High Limits with Alarm Memory of 1000 Testing Values for Browsing and Ouput Wireless