Dual calibrated Knoop/ Vickers test block. 500 grams, 500-800 HK/ HV. NIST traceable, ASTM E384calibration
Used to check the accuracy of Knoop / Vickers testers, Wilson® Hardness test blocks set the standard for the industry. Available in a comprehensive range of nominal hardness values and load force applications, Wilson Hardness Knoop and Vickers test blocks are highly polished, precision calibrated, and are certified to meet all relevant ASTM and ISO standards.