Bore Gauge Set without Digital Indicator Range 0.500 in to 0.800 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 0.8000 in Minimum Measurement - Inch 0.5000 in Operation Type Digital Accuracy +/-0.00016 in Contact Point Material Carbide Includes (2) Probes Extension Rod Repeatability 0.0001 in