Mitutoyo Gauge block set Tolerance class 0

Made from carefully selected, age-specific special steel. Particularly wear-resistant due to controlled hardness (HV 800). Carefully hardened and hand-ground. Includes a manufacturer's test protocol that can be traced back to national standards: Each measuring block is individually marked with an identification number. The actual deviation from the nominal size is recorded in the protocol. The absolute actual dimension is thus known. Tolerance class 0 serves as the original measure for verifying working dimensions. Designed for setting measuring instruments with very high accuracy.