Available with dial or digital indicator and integrated wireless data transmitters, 1280 P Adjustable Bore Gauges measure diameters from 0.50–8 in. with extensions, and depths from 3–48 in. Self-centering 844 N Adjustable Bore Gauges measure diameters from 0.7–32 in. and are virtually impervious to temperature changes. With OD measuring capacity from 0–20 in., 300 P Snap Gauges feature Channel Lock design that assures precisely parallel anvil surfaces, with positive position locking at any point.