(1 Year Warranty Subjected to Terms and Conditions) Steel and cast steel , alloy tool steel, stainless steel, gray cast iron, nodular cast iron, cast aluminum alloy, copper zinc alloys (brass), an alloy of copper and tin, copper (bronze), forged steel Features - Automatically identify 7 types of impact devices for special application - Freely switch to hardness scales HRB,HRC,HV,HB,HS,HL - Direct calibration on HL,HRC,HB - Large LCD screen with back-light, showing all functions and parameters - Upper and lower limit and sound alarm - Conversion to tensile strength (U.T.S) Find out more at https://matrixintegrity.com/ndt-instruments-information/ Price does not include additional taxes, fees and surcharges. Please note preorder usually takes about 1-4 weeks.