Digital Spherical Micrometer Range 3 in to 4 in Resolution 0.0001 in Accuracy +/-0.00020 in SPC Output No Long Form Calibration Certificate No Anvil Shape Spherical Anvil Size 0.256 in Dimension Type Inch Operation Type Mechanical Thimble Type Ratchet Anvil Material Carbide Includes Setting Standard Lock Nut Type Lock Nut Maximum Measurement - Inch 4 in Minimum Measurement - Inch 3 in Rotating Spindle (Yes/No) Yes Spindle Flat Spindle Diameter 0.197 in Spindle Material Carbide