Starrett No. 124-C Solid-Rod Inside Micrometer Set provides 8–32" inside measurement with.001" graduations, a fixed-range kit designed for bore work where access is limited. It uses a solid-rod construction with a C-size rod diameter of approximately 11/32" (8.5 mm) for rigidity on larger bores, and ships with four extension rods contained in a wooden case. This set is intended for machinists and inspectors who require precise internal measurements of cylindrical features within the 8–32" range, commonly used in precision machining and quality-control applications.
