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Hardness Tester, 6-in-1 Metal Hardness Tester Digital Rebound Leeb Hardness Meter Measure HR,HL,HB,HV,HS,HRB Durometer Stainless Steel Meters(With Block Set) HRC,HL,HB,HV,HS,HRB Metal Meters 1. Hardness system: HL, HRC, HRB, HV, HB, HS 2. Test accuracy: HLD: ±6, HRC: ±1, HB: ±4 3. Standard impact device: D type impact device Hardness Tester, 6-in-1 Metal Hardness Tester Digital Rebound Leeb Hardness Meter Measure HR,HL,HB,HV,HS,HRB Durometer Stainless Steel Meters(With Block Set)