MA Ford 61B012501, 1/8 HSS UniFlute Countersink, 60 Deg, Blaze Coated, Diameter: 1/8, Shank Diameter: 1/8, Overall Length: 1-1/2, Included Angle Degree: 60, Base Material: HSS, Number of Flutes: 1, MPN: 61B012501, PKG QTY: 1 PC, Description: MA Ford Series 61 HSS Uniflute Countersink. The original single flute countersink designed for general purpose countersinking, chamfering or deburring.