In a nutshell
The right choise for
With the Mitutoyo 368-994 inside micrometer set, you achieve precise internal bore measurements across machine shops and toolmaking facilities. Covering a range of 100 to 200 mm across four individual micrometers, this set lets you inspect large cylindrical components, sleeves, and engine cylinders with confidence. The self-centering three-point contact geometry aligns stably inside the bore, eliminating inaccuracies caused by misalignment. Thanks to the clear 0.005 mm vernier graduation and the built-in ratchet stop for constant measuring force, you get dependable, repeatable readings every time. The complete set comes with four micrometers, 125 mm and 175 mm setting rings, an extension rod, and a fitted storage case.