●High stability and precision ●With built-in thermal printer ●Rechargeable Li-ion battery and auto power-off function ●Direct calibrate on HL,HRC,HB, and freely switch to 8 different hardness scales ●Automatically identify 7 types of Impact devices for special application ●Test at any angle and direction, even upside down ●Conversion to tensile strength (U.T.S) ●PC Software for data transmission, analysis and measurement reports printing ●3 years warranty and life-long services ●Hardness scale HSD is optional ( for testing mill roll )

●10 types of metals: steel and cast steel, alloy tool steel, stainless steel, gray cast iron, nodular cast iron, cast aluminum alloy, copper zinc alloys, copper and tin alloy, copper, forged steel. Mill roll is optional.