Micrometer Set Inside, Starrett, Mfr#: S78XTFZ

Mechanical 3-Point Inside Micrometer Set, Range 2 in to 4 in, Resolution 0.00025 in, Inside Micrometer Type 3-Point Inside Micrometer, Number of Micrometers 3, Operation Type Mechanical, Thimble Type Friction, Case Included Yes, Contact Point Material Carbide, Features Self-Centering Contacts For True Readings, Blind Bore Measuring Capability Above 1/2 in Diameter, Extensions Available up to 6 in For Deep Hole Measuring, Depth Stop/Collar Also Available For .080 in-.250 in Range