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- Includes V-anvil and conical spindle inserts for measuring pitch diameters of screw threads
- Vernier scale in inch units for taking precise outside diameter (OD) measurements
- Ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurement
- Satin chrome finish on thimble and sleeve helps resist rust and reduce glare
- Hammertone, baked enamel finish for protection and durability of frame
