Tool-Flo 2468778 Helical Flute Thread Mills; Material: Carbide ; Thread Size (Inch): 1-1/8-7 - 1-1/4-7 ; Thread Type: Internal ; Shank Diameter (Decimal Inch): 0.7500 ; Cutting Diameter (Decimal Inch): 0.7500 ; Length Of Cut (Decimal Inch - 4 Decimal