Mueller 77M Adjustable Shallow Diameter Gages

For use at machine or inspection area for checking inside and outside diameters, shallow bores, counter bores, pitch diameters of gears and many other dimensions.
Fast & dependable 2 point measurement directly across diameter.
Frictionless Reed Transfer Mechanism provides precise repeatability.
0 to 1″ adjustable gaging depth.

Fast acting Rack & Pinion fine adjustment for rapid setting.
Hardened steel gage rest surface
Positive mechanism instantly changes gaging direction & reloads indicator. No loose parts.
May be set with gage blocks, ring gage or qualified part.
Several contact types available from stock.
Gaging contacts may be rotated as they wear, greatly extending their useful life.