Starrett No. 124-C Solid Rod Inside Micrometer Set

Starrett No. 124-C Solid Rod Inside Micrometer Set is a precision bore‑measuring kit designed for large internal diameters, delivering.001 inch graduations and a 0.5 inch spindle travel per micrometer head. The 124‑C combines four long measuring rods with two micrometer heads and a protective case, including an 8–14 inch rod, a 14–20 inch inside rod, a 20–26 inch rod, and a 26–36 inch inside rod. The C‑size set uses rods around 11/32 inch (about 8.5 mm) in diameter, consistent with Starrett's solid‑rod design, with other sizes offered in related 124‑series sets. Two micrometer heads—typically a 1/2 inch and a 1 inch range—accompany the kit to span the extended measuring lengths.