- Each set consists of an inside micrometer head and a series of fully hardened and lapped extension rods of different lengths
- Anvil and spindle are hardened and precision ground with microlap finish on ends
- Spindle thread hardened, ground and lapped
- .001" Microfine graduations on satin chrome
- Positive locking nut on spindle
Meets or exceeds Federal accuracy specs. Reference standard included with set. Includes a wrench and fitted case.