Micro 100 IAT-1000-12 Internal ACME 29&deg; Angle Threading Tool, 0.360" Minimum Bore Diameter, 0.085" Projection, 1.000" Maximum Bore Diameter, 0.028" Flat, 12 Threads per Inch, 0.3750 Shank Diameter, 2.5" Overall Length, Solid Carbide Tool