Precision Twist Drill Taper Shank Drill Bit, Heavy Duty, Series: 209CO, Imperial, 39/64 in Drill - Fraction, 0.6094 in Drill - Decimal Inch, 8-3/4 in Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 4-7/8 in Flute Length, #2 Morse Taper Shank Taper Designation, 135 deg Point, Notched Point, Right Hand Cutting Direction, HSS-E Cutting Edge, No Through Coolant, HSS-E, Oxide Treated, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum Magnesium, Synthetic Materials, Hard Materials and Graphite