It has a variety of built-in hardness systems, which can be converted between Webster (HWA), Rockwell (HRE), Rockwell (HRF), Rockwell (HRB), Vickers (HV) and Brinell (HB). LS255 Digital Webster Hardness Tester HWA HRE HRF HRB HV HB for Brass Hard Aluminum Alloy.
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