... Hardness tester 1.Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HS 2.Display:dot matrix LCD,128*64 dots MH310 portable Hardness ... of impact deviceHardness value of Leeb standard hardness blockError of displayed valueRepeatability1D760±30HLD530±40HLD±6 HLD ... :HLD(170~960)HLDMeasuring direction:0°~360°Hardness Scale:HL,HB,HRB,HRC,HRA,HV,HSDisplay ... dimensions:212mm×80mm×32mm MH310 digital portable Hardness tester