Tool-Flo 2462615 Helical Flute Thread Mills; Material: Carbide ; Thread Size (Inch): 1-11-1/2 - 2-11-1/2 ; Thread Type: Internal; External ; Shank Diameter (Decimal Inch): 0.6250 ; Cutting Diameter (Decimal Inch): 0.6250 ; Length Of Cut (Decimal Inch