Leeb Hardness Tester 7 in 1 Digital Display Metal Pen Type Leeb Hardness Tester Meter Item Type: Leeb Hardness Tester Material: ABS, Tungsten Carbide Battery: Polymer Battery x 1, Battery Capacity: 350mAh (Included) Battery Continuous Working Time: Approximately 11 Hours Charging Specifications: DC5V500mA Type C Interface Supported Languages: Chinese, English Impact Device: Standard D Type Measurement Range: 170-960HLD Indication Error: ±6HL at 760HLD, ±10HL at 530HLD Measurement Direction: Support vertical downwards, oblique downwards, horizontal, oblique upwards, vertical upwards Hardness Measurement Materials: Steel and Cast Steel, Alloy Tool Steel, Stainless Steel, Gray Cast Iron, Nodular Cast Iron, Cast Aluminum Alloy, Copper Zinc Alloy Brass, Copper Tin Alloy (Bronze), Pure Copper, Forged Steel Strength Measurement Materials: Low Carbon Steel, High Carbon Steel, Cr Steel, Cr V Steel, Cr Ni Steel, Cr Mi Steel, Cr Ni Mo Steel, Cr Mn Si Steel, Ultra High Strength Steel, Stainless Steel Hardness Scales: Leeb (HL), Brinell (HB), for Rockwell B (HRB), for Rockwell C (HRC), for Rockwell A (HRA), for Vickers (HV), Shore (HS) Calibration: Support standard Leeb hardness block calibration Operating Environment: Surrounding environment without strong vibration, strong magnetic field, erosive medium, or severe dust