Harvey Tool 842441-C3 Chamfer Mills; Cutter Head Diameter (Fractional Inch): 1/4 ; Cutter Head Diameter (Decimal Inch): 0.2500 ; End Type: Corner Chamfer ; Length of Cut (Inch): 7/64 ; Shank Diameter (Decimal Inch): 0.2500 ; Shank Diameter (Inch): 1/