Bore Gauge without Digital Indicator Range 4 in to 5 in Resolution 0.00005 in/0.001 mm SPC Output 2124 Actuation Type Pistol Grip Contact Style 3 Point Dimension Type Inch Includes Indicator No Maximum Measurement - Inch 5 in Minimum Measurement - Inch 4 in Operation Type Digital Accuracy +/-0.00024 in Contact Point Material Carbide Includes Extension Rod Repeatability 0.0001 in