Dormer Jobber Length Drill Bit, Type N Heavy Duty, Series: A777, Imperial, 29/64 in Drill - Fraction, 0.4531 in Drill - Decimal Inch, 142 mm Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 94 mm Flute Length, 29/64 in Shank, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, HSS-E Cutting Edge, No Through Coolant, HSS-E, Oxide Treated, Applicable Materials: Aluminum Magnesium, Cast Iron, Copper, Steel, Stainless Steel, Titanium, Nickel and Hard Materials