Mitutoyo Inside Micrometer Interchangeable Rod Type 1 2" Adhesives No need to use expensive No need to use expensive deionised water 168T Torx Screwdriver 20PR x 250mm 168T Torx Screwdrivers T20 Mitutoyo Inside Micrometer 1 2" Interchangeable Rod TypeWide range of inside measurements possible by combining extension rods and anvils with the measuring heads The sleeve is rotated to adjust the index line position when setting to a length standard 001" graduations Inside Micrometer set Interchangeable Rod Style 2 extension rods included Each interchangeable extension rod is marked with its measuring range For models supplied with more than one rod