EP also sells gear tooth measuring gadgets referred to as equipment gauges! Gear gauges decrease problems, conserving time and income when identifying and ordering gears. These pitch templates have 9 groups to figure out all common pitch dimensions: Diameter Pitch “DP”, Circle Pitch “CP”, Exterior Involute Spline, Metric Modulus “MOD”, Limited Tooth, Wonderful Pitch, Coarse Pitch and Extraordinary Pitch .