Fowler 52-250-301-1, 0 - 1" Digit Counter Disc Micrometer

Includes case Fowler's Digit-Disc Micrometers feature extra large diameter discs which easily enter hard to reach places such as narrow grooves, slots and recesses. Features Hammertone blue baked enamel finished frame is tapered for hard to get at places. Anvil and spindle are hardened and precision ground with microlap finish on measuring faces. Positive locking nut on the spindle Quick and easy zero adjustment on sleeve Ratchet thimble The disc type anvil and spindle simplifies measuring the thickness of difficult, closely spaced sections, ribs, keys, fins, cutting edges on forming tools, chordal thickness of gear teeth, etc. Meets or exceeds Federal accuracy specs.