Mechanical Outside Micrometer, Range 0 mm to 25 mm, Resolution 0.01mm, Accuracy +/-0.001 in, Long Form Calibration Certificate No, Dimension Type Metric, Included Certification Certificate of Inspection, Mechanical Display Type Vernier, Thimble Type Friction/Ratchet, Includes Fitted Carrying Case Vernier ratchet is used to stop or friction thimble for exact, repetitive readings. Includes a standard bar except for 0" to 1" and 0 to 25mm models.