These drill bits come in sizes expressed in millimeters. They have a TiAlN coating that withstands high temperatures and protects the bits from wear during high-speed, dry machining applications with difficult-to-machine ferrous metals. The 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 8.30 mm Decimal Equivalent 0.3268 Measurement System Metric Material - Machining Carbide Finish - Machining TiAlN Drill Bit Point Angle 140 Degrees Drill Bit Point Type Self-Centering Point Coolant Fed Coolant Through Number of Coolant Holes 2 Flute Type Spiral Number of Flutes 2 Flute Length 47.00 mm Maximum Drilling Depth 35 mm Cutting Direction Right Hand Shank Type - Machining Straight Shank Dia. 10.00 mm Shank Length 40 mm Overall Length 89.00 mm Depth:Dia. Ratio 3xD Drill Length Class Jobber Length Drill Point Length 1.51mm Drill Bit Grouping Individual Series X.treme Plus Standards DIN 6537 Drill Diameter Tolerance M7 Sheeter Drill No Material Grade - Machining K30F Primary Material Application Aluminum, Brass, Bronze, Cast Iron, Copper, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium Primary Material Application ISO Code H, K, M, N, P, S Secondary Material Application Composite Secondary Material Application ISO Code O