Features 1、Easy to use, can be operated with one hand, comfortable grip for easy measurement. 2、Digital display Barcol hardness tester, digital display four units, clear reading. 3、Accurate measurement, detachable pressure needle, to maintain measurement accuracy. 4、Before measurement, short press the power/function key to realize the conversion of HW, HB, HV, HRB, HRE, HRF, HRH units. 5、Durable, using high‑quality iron material, not easy to be damaged, can be used for a long time. Specification Item Type: Barcol Hardness Tester Material: Iron Model: 934-1S Power Supply: CR2030 1x3V (not included) Application: Metal hardness measurement Measurable Parameters: Barcol (HBa), Brinell (HB), Vicker (HV), Webster hardness value (HW), for Rockwell hardness value (HRB/HRE/HRF/HRH) Measuring Range: 0-100 HBa, equivalent to 25-135HBW Resolution: 0.5 HBa Indication Error: 81-88HBa±1 HBa 42-48 HBa±2HBa Repeatability Error: 81-88HBa±1.5HBa 42-48HBа±2.5HBa Working Environment: Temperature 0-40℃ humidity: <80%RH Package List 1 x Hardness Tester(Battery Not Included) 4 x Hardness Block 1 x Supporting Feet 2 x Spare Indenter 1 x Correction Wrench 1 x Instrument Box 2 x Key 1 x Manual