Hardness Tester Automatic Scales HR15N/T HR15W/X/Y HR30N/T HR30W/X/Y HR45N/T HR45W/X/Y HRA HRB HRC HRD HRE HRF HRG HRH HRK HRL HRN HRP HRR HRS HRV Resolution 0.1 HR Indenter Ball Diamond Work Surface Depth (In.) 7 7/8 in Max Workpiece Height (In.) 8 21/32 in USB Output Features Automatic Testing Digital Display Force Loading By Electric Motor LCD Touch Screen Low and High Limits Self-Correcting The Hardness Value for Curved Workpiece