Mechanical Micrometer Head Range 0 in to 1 in Resolution 0.001 in Accuracy 0.00012 in Dimension Type Inch Mouting Hub Diameter 1/2 in Operation Type Mechanical Rotating Spindle (Yes/No) Yes Spindle Shape Flat Thimble Type Ratchet Case Included Yes Includes Hard Plastic Case Long Form Calibration Certificate No Maximum Measurement - Inch 1 in Minimum Measurement - Inch 0 in Spindle Diameter 1/4 in Spindle Material Carbide