Mechanical 3-Point Inside Micrometer Range 2.5 in to 3 in Resolution 0.0002 in SPC Output No Movement of Screw 1/2 in Inside Micrometer Type 3-Point Inside Micrometer Number of Measuring Rods 0 Number of Micrometers 1 Operation Type Mechanical Thimble Type Ratchet Case Included Yes Case Type Plastic Case Contact Point Material Carbide Contact Point Shape Curved Features Self-Centering Contacts Furnished Micrometer Bore Gauge 3 Point Contact