Mechanical Bore Gauge without Mechanical Indicator Range 0.059 in to 0.165 in Dial Graduation 0.00005 in 0.0001 in 0.001 in Operation Type Mechanical Contact Style Split Ball Dimension Type Inch Includes Indicator No Maximum Measurement - Inch 0.165 in Minimum Measurement - Inch 0.059 in Requires Indicator Yes Accuracy 118 micronin Contact Point Material Steel Includes Case Yes Series 2429 Compatible Dial Graduations 0.00005 in 0.0001 in 0.001 in Repeatability 39micron in