Mitutoyo Electronic Internal Caliper Gage These internal caliper gages are designed for measuring Internal Diameters that might be difficult to get to. They are also often galled a Groove Gage because of their perfect design for measuring IDs on internal grooves. Features include... 0.20" - 0.59" / 5-15mm Measuring Range 0.0002" / 0.015mm Resolution 0.0008" / 0.08mm Accuracy 1.37" / 35mm Max Measuring Depth Ball 0.024" / 0.6mm Radius LCD Analog / Digital Display IP63 Rated Protection SPC Output Function Include... Zeroset Preset Auto Power Off In / Metric Conversion Data Hold Min / Max Value Hold