Mechanical V-Anvil Micrometer Range 0.2 in to 1 in Resolution 0.001 in Accuracy +/- 0.00016 in SPC Output No Long Form Calibration Certificate No Anvil Shape V-Shaped Anvil Size 0.256 in Dimension Type Inch Operation Type Mechanical Thimble Type Ratchet Anvil Material Carbide Case Included Yes Case Type Plastic Features Measure The Outside Diameter Of Cutting Tools With 3 or 5 Flutes Includes Hard Plastic Case Lock Nut Type Lock Nut Maximum Measurement - Inch 0.8 in