Trusted by machinists, inspectors, and STEM educators for professional dimensional analysis in workshops, production lines, and technical training environments. Inside micrometer with a stainless steel body provides accurate bore measurements across a range of sizes, with erosion-resistant durability. Durable stainless steel construction offers long-lasting performance, featuring clear markings and ergonomic, slip-resistant handles for precise control during delicate measurements. Optimized for measuring engine cylinders, pipe fittings, and precision machined components across automotive, manufacturing, and scientific research sectors. Use scenarios: - Inspect engine cylinder bores during service or rebuild to verify wear, taper, or out-of-round conditions. - Verify internal diameters of pipe fittings and assembled components in hydraulic, pneumatic, or plumbing work. - Conduct quality control in manufacturing labs to confirm dimensions of machined parts against tolerances.