Groove Micrometer, Non-Rotating Spindle 3-4", 0,5" Flange 146-235 Mitutoyo

A non-digital tubular Mitutoyo micrometer equipped with concentric, disc-shaped anvils for making measurements inside holes, such as width, depth and location of grooves and projections. Separate graduations for inside and outside measurements avoid need for corrections for anvil thickness. A ratchet stop guarantees repeatable measurement.