Internal Tool 93-4840 Chucking Reamers; Reamer Diameter (Inch): 31/64 ; Reamer Diameter Range (Decimal Inch): 0.4000 - 0.4999 ; Reamer Diameter (Decimal Inch): 0.4840 ; Tool Material: Solid Carbide ; Flute Type: Straight ; Coating/Finish: Bright/Unco