Mechanical Bore Gauge Range 0.24 in to 0.4 in Dial Graduation 0.0005 in Operation Type Mechanical Contact Style Anvil Dimension Type Inch Includes Indicator Yes Maximum Measurement - Inch 0.4 in Minimum Measurement - Inch 0.24 in Requires Indicator Yes Accuracy +/-0.00075 in Contact Point Material Steel Includes Case Yes Series 2323 Repeatability 0.00015 in