Mechanical Depth Micrometer, Range 0 in to 4 in, Resolution 0.001 in, Accuracy +/-0.00012 in, Long Form Calibration Certificate No, Base Length 4 in, Base Style Full, Dimension Type Inch, Included Certification No, Mechanical Display Type None, Number of Measuring Rods 2, Operation Type Mechanical, Resolution - Counter Not Applicable, Rod Diameter 0.177 in, Anvil Material Steel, Anvil Shape Flat, Case Included Yes, Features Better Rod Accuracy, Includes Rods with Flat End, Lock Nut Type Screw