MA Ford 61B075001, 3/4 HSS UniFlute Countersink,60 Deg, Blaze Coated, Diameter: 3/4, Shank Diameter: 1/2, Overall Length: 2-3/4, Included Angle Degree: 60, Base Material: HSS, Number of Flutes: 1, MPN: 61B075001, 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.