Mechanical Outside Micrometer, Range 0 in to 1 in, Resolution 0.0001 in, Accuracy +/-0.0001 in, Long Form Calibration Certificate No, Dimension Type Inch, Included Certification Starrett SLC - Standard Letter of Conformance, Mechanical Display Type Vernier, Operation Type Mechanical, Thimble Type Friction, Anvil Material Carbide, Anvil Shape Flat, Case Included No, Includes Key Spanner, Lock Nut Type Ring, Maximum Measurement - Inch 1 in, Minimum Measurement - Inch 0 in, Spindle Diameter 235 in