Internal Tool 64-1330 Chamfer Mills; Cutter Head Diameter (Fractional Inch): 1/8 ; Cutter Head Diameter (Decimal Inch): 0.1250 ; End Type: Double ; Shank Diameter (Decimal Inch): 0.1250 ; Shank Diameter (Inch): 1/8 ; Shank Length (Decimal Inch): 1.98