Precision Twist Drill Precision Twist Drill Taper Length Drill, General Purpose, Series: QC91G, #42 Drill Size - Wire, 0.0935 in Drill Size - Decimal Inch, 4-1/4 in Overall Length, 6XD Cutting Depth, 2 Flutes, Parabolic Flute, 2-1/4 in Flute Length, 0.0935 in Shank, Straight Shank, 135 deg Point, Radius Split Point, Right Hand Cutting, HSS Cutting Edge, HSS, TiN, 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