Mitutoyo Analog Holtest Metric Non Interchangeable Head Set Non Pin

The Mitutoyo mechanical Holtest internal micrometer set includes complete gages (micrometer head units and measuring heads) for each size. Three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. Hardened steel spindles with a carbide ball and cones with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtests ratchet stop mechanism provides a constant measuring force on the hardened steel spindle to ensure accurate, even measurements.