Mechanical Depth Micrometer, Range 0 in to 12 in, Resolution 0.001 in, Accuracy +/-0.00015 in, +/-0.003 mm, Long Form Calibration Certificate No, Base Length 4 in, Base Style Full, Dimension Type Inch, Mechanical Display Type None, Number of Measuring Rods 12, Operation Type Mechanical, Rod Diameter 4 mm, Anvil Material Steel, Anvil Shape Flat, Case Included Yes, Case Type Plastic