Mechanical 3-Point Inside Micrometer Range 5/8 in to 3/4 in Resolution 0.00025 in SPC Output No Movement of Screw 3/8 in Inside Micrometer Type 3-Point Inside Micrometer Number of Measuring Rods 0 Number of Micrometers 1 Operation Type Mechanical Thimble Type Friction Case Included Yes Contact Point Material Carbide Contact Point Shape Curved