Precision Twist Drill Taper Length Drill, General Purpose, Series: QC91PM, 0.5709 in Drill - Decimal Inch, 220 mm Overall Length, 6XD Cutting Depth, 2 Flutes, Parabolic Flute, 144 mm Flute Length, 0.5709 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, Copper, B-Brass, Bronze, A-Brass, Aluminum, Magnesium, Unalloyed, Alloy Steel/Hardened Steel, Tempered Steel, Ferritic + Austenitic, Martensitic