Mitutoyo 368-920 368 Series Mechanical Holtest 3-Point Internal Micrometers Complete Set (4-5", 5-6", 6-7", 7-8")

The Mitutoyo mechanical Holtest internal micrometer set includes complete gages (micrometer head units and measuring heads) for each size. Three hardened-steel anvils evenly spaced at 120° allow for true alignment of the axis bore for accurate, easily repeatable measurements. The holtest's ratchet stop mechanism provides a constant measuring force on the hardened-steel spindle to ensure accurate, even measurements.

Features:

• Metric and Inch set
• Optional extension rod allows for measuring deep holes
• Scale on thimble and sleeve is laser etched for easier reading in all conditions
• Supplied in a wooden case