Industrial SPI 10 HLD Hardness Test Block Kit delivers a multi-scale set of reference hardness blocks, covering 13 HRB, 20 HB, 20 HRC, 4 HSD, and 45 HV to 100 HRB, 100 HSD, 68 HRC. The kit centers on SPI 10 HLD and provides established reference points across the most commonly used hardness scales for cross-checking test results. With these known values at hand, technicians can compare measurements across HRB, HB, HRC, HSD, and HV scales quickly and reliably.
