Some Special Machinst Bit i Found today!
Only Markings are (1 DIV.=.0001 ON Dia.
Has a Measuring Wheel that Doesnt Look like it Does anything But Spin around the Bit...It Doesnt Adjust anything Like Micrometers Do...Almost Looks like it Is Meant to Go In a Chuck/Drill
Its Aprox 5 1/4" Long and 1 3/4" In Diameter!
Any Idea What This is Used for?
Thanks