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The TiAlN coating on these drill bits withstands high temperatures and protects the bits from wear during high-speed, dry machining applications with difficult-to-machine ferrous metals. These bits have spiral flutes that evacuate chips as the bits drill into a workpiece, and they have a straight shank that installs into a drill chuck or similar toolholder. This listing is for each. Technical Specification Item Jobber Length Drill Bit Drill Bit Size 6.80 mm Decimal Equivalent 0.2677 Measurement System Metric Material - Machining Carbide Finish - Machining TiAlN Drill Bit Point Angle 140 Degrees Drill Bit Point Type 4 Facet Point Coolant Fed Non-Coolant Through Flute Type Spiral Number of Flutes 2 Flute Length 69.00 mm Maximum Drilling Depth 57 mm Cutting Direction Right Hand Shank Type - Machining Straight Shank Dia. 6.80 mm Shank Length 40.00 mm Overall Length 109.00 mm Depth:Dia. Ratio 8xD Drill Length Class Jobber Length Drill Point Length 1.24mm Drill Bit Grouping Individual Series Alpha 22 Standards DIN 338 Drill Diameter Tolerance H7 Sheeter Drill No Material Grade - Machining TFL Primary Material Application Aluminum, Brass, Bronze, Cast Iron, Copper, Steel Primary Material Application ISO Code K, N, P Secondary Material Application Nickel, Titanium Secondary Material Application ISO Code S