Made of carefully selected, aged special steel. Particularly wear-resistant due to controlled hardness (HV 800). Carefully hardened and hand lapped. Edges slightly bevelled. Manufacturer’s test certificate traceable back to national standards: Each gauge block is provided with its own unique identity number. The actual deviation from the nominal dimensions is recorded in the test certificate. The absolute actual dimension is therefore known.
Tolerance class 0 as a master standard to check workshop gauges. For setting gauges to very high accuracies.