Calibration set includes: 1/16" Master Ball Penetrator, HR30T40 Rockwell Master Test Block, HR30T53 Rockwell Master Test Block, HR30T73 Rockwell Master Test Block

• Provides superior accuracy in validating hardness testers
• Master test blocks and Master indenter used to calibrate the set Highest quality steel and brass
• Test blocks are hand lapped and polished to a mirror finish
• Calibrated in state of the art ISO/ IEC 17025 accredited laboratory ISO 6508
• Manufactured in accordance to the latest Rockwell Revision; E18-07