... HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, can detect various metal materials. ... automatic identification the type of impact device, replacement without re-calibration. Support "Forged (Steel)" material, when using D / ... can spot print the test report. Has a software calibration feature. Built-in Ni-MH rechargeable batteries and charge ...