Bore Gauge without Digital Indicator Range 11 in to 12 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 12 in Minimum Measurement - Inch 11 in Operation Type Digital Accuracy +/-0.00036 in Contact Point Material Carbide Includes Extension Rod Repeatability 0.0001 in