Precision Twist Drill Taper Length Drill, General Purpose, Series: QC91P, 9/16 in Drill - Fraction, 0.5625 in Drill - Decimal Inch, 8-1/4 in Overall Length, 6XD Cutting Depth, 2 Flutes, Parabolic Flute, 4-7/8 in Flute Length, 9/16 in Shank, Straight Shank, 135 deg Point, Radius Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Uncoated, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Lamellar Graphite, Alloy Steel/Hardened Steel, Tempered Steel, Free Machining Stainless Steel, Austenitic and Ferritic + Austenitic Martensitic