CIM-631: Concrete Test Hammer, as per IS:13311-1992 reprinted 1995, "N" type with carrying case, Rubbing Stone (Small) with our own calibration certificate.
CIM-631: Concrete Test Hammer, as per IS:13311-1992 reprinted 1995, “N” type with carrying case, Rubbing Stone (Small) with our own calibration certificate.