Our certified 1/2" Carbide Ball Rockwell Hardness Tester Indenters come with either a 3mm or 6.35mm shaft diameter and are calibrated & DUAL-certified by UPI Laboratories Europe BV traceable to National/International standards according to ISO 6508/2 & ASTM-E18 A3. Get a replacement indenter for your Rockwell hardness tester

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