Mitutoyo Dial Indicator # 2904AB Mitutoyo's dial indicators now offer users more stability and longer life, thanks to advances to the inner workings of the rack and pinion gear system. Shock resistance is increased with a more robust gear train, while contamination resistance has been dramatically increased with a tighter seal around the bezel and frame, and the elimination of a lifting lever screw. Features include... 0-1" Measuring Range 0.100" Range per Revolution 0.001" Graduations 100-0 Dial Reading Reverse Reading Flat Back 3/8" Diameter Stem 4-48 UNF Threaded Tip 2" Diameter Face This gage is an updated version of the old 2904SB Dial Indicator.