0-1 inch Range Imperial Dial Indicator Gauge 0-1 Inch Measuring Range - Plunger travel of one inch, with removable contact tip. Large Diameter Dial - 2 inch diameter dial with clear 0.001inch graduations. Adjustable Dial - Adjustable dial face for zero setting with lock and tolerance pointers. Two Mounting Options - Mounting via the 3/8" stem or mounting lug fitted to the back of the gauge with a 1/4" diameter mounting hole.