Type Bore Gauge Minimum Measurement Decimal Inch 07 Gage Depth Inch 4 Maximum Measurement Decimal Inch 15 Asimeto Certified Bore Gauges measure diameters of small holes by converting the radial displacement to axial displacement of a measuring rod, which is shown on the digital indicator Additional accessories to extend the range of our Bore Gauges are available Furnished With Instruction manual, Calibration certificate, Features Resolution 0000050002mm Dynamic carbide contact point Has analog sweep display to determine minimum reading Canister and fixed anvils