these models are suitable for testing hardness of metals and alloys of all kinds hard or soft, whether flat, round, or irregular shape. These testers are simple in design and easy to operate, yet sensitive & accurate. Various models from the wide range are suitable for schools, laboratories, tool-rooms, inspection, heat treatment department, factories, etc. These testers strictly conform to IS : 3804 - 1988, BS : 891 parts 1 & 2, ASTM : E 18 for Rockwell test. IS : 2281 - 1983, BS : 240, ASTM : E 10 for Brinell test and IS 5073 - 1988 ASTM : E 18 for Rockwell Superficial Test.