– For testing the Rockwell hardness of various materials to scales A, B, and C – Unit is designed with mechanical loads for precise hardness readings – Conforms to the requirements of ASTM E18, ISO 6508-2, and GB/T 230.2 standards – Readings provided to a minimum resolution 0.5HRC – With Diamond cone penetrator 1pc – V-notch anvil 1pc – Small flat anvil 1pc – Large flat anvil 1pc – Rockwell standard 5pc – 1/16″ steel ball penetrator 1pc – Instruction manual