Mitutoyo 2-Point Internal Micrometer Holtest Set 50-100mm (4 pcs.) 368-993A Mitutoyo internal micrometer set consisting of individual gauges, the appropriate setting rings and an extension tube for depth measurement applications. Contact surfaces made of hardened steel. A ratchet guarantees repeatable measurement. Specification Digital Analog: Analog Inch Metric: Metric Range: 50 100 mm Graduation: 0,005 mm Individual ranges: 50 63, 62 75, 75 88, 87 100 mm Scale: Thimble and sleeve satin chrome finish, Up to 12 mm : 17 mm