Mechanical Outside Micrometer, Range 0 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, Mechanical Display Type Vernier, Operation Type Mechanical, Thimble Type Ratchet, Anvil Material Carbide, Anvil Shape Flat, Case Included Yes, Case Type Plastic Case, Lock Nut Type Lock Nut, Maximum Measurement - Inch 4 in, Minimum Measurement - Inch 0 in