QC91P Series No.12 High Speed Steel General Purpose Taper Length Drill Bit Features. High speed steel HSS provides good wearresistance. Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic. Parabolic flutes are constructed with a wider flute shape for increased chip flow. Tapered web configuration. No coolant channel. Pack of 12Applicable Materials. Magnetic Soft Steel, Structural Steel/Case Carburising Steel, Plain Carbon Steel, Lamellar Graphite, Alloy Steel/Hardened Steel, Tempered Steel, Free Machining Stainless Steel, Austenitic and Ferritic Austenitic MartensiticSpecifications. Cutting Depth 6XD. Cutting Direction Right Hand. Cutting Edge Material HSS. Finish Bright. Flute Length 35/8 in.. Flute Type Parabolic. Letter/Wire Size No.12. Material HSS. Number of Flutes 2. Overall Length 6 in.. Point Angle 135 deg. Point Type Radius Split. Series QC91P. Shank Size 0.189 in.. Shank Type Straight. Type General Purpose