Precision Twist Drill Screw Machine Drill, General Purpose Heavy Duty, Series: QC41P, Imperial, #1 Drill - Wire, 0.228 in Drill - Decimal Inch, 2-7/16 in Overall Length, 3XD Cutting Depth, 2 Flutes, Parabolic Flute, 1-5/16 in Flute Length, 0.228 in Shank, Straight Shank, 135 deg Point, Radius Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Alloy Steel, Alloyed Aluminum, Alloyed Titanium, Brass, Bronze, Copper, Free Machining Stainless Steel, Ferritic + Austenitic, Hardened and Tempered Steel, Lamellar Graphite, Magnetic Soft Steel, Martensitic, Nodular Graphite/Malleable Cast Iron, Plain Carbon Steel, Structural Steel/Case Carburizing Steel, Unalloyed Aluminum Magnesium, Unalloyed Nickel and Unalloyed Titanium