Buy a 3 point inside micrometer online. The provided internal micrometer with equipped with a 150 mm extension rod, 6~8 mm (0.23 to 0.31 inch) measuring range and 0.005 mm resolution, ideal for the precision measurement of blind holes and through holes.
The inside micrometer is an instrument for the accurate linear measurement of the diameter, thickness, length and other dimensions of solids. 3 point internal micrometer is mainly used to measure internal dimensions such as the internal diameter of a hole or a tube and is widely used in mechanical engineering, machining and most mechanical industries.
Tips: Maintainance of the Inside Micrometer