Mechanical Outside Micrometer Range 3 in to 4 in Resolution 0.0001 in Accuracy +/-0.00020 in Long Form Calibration Certificate No Dimension Type Inch Included Certification Short Form Certificate of Inspection Traceable to NIST Jaw Depth 2.362 in Mechanical Display Type Vernier Operation Type Mechanical Thimble Type Ratchet Anvil Material Carbide Anvil Shape Flat Lock Nut Type Lock Nut Maximum Measurement - Inch 4 in Minimum Measurement - Inch 3 in Rotating Spindle (Yes/No) Yes