GUHRING 9005490081000 Jobber Bit, 8.10mm, High Speed Steel. More details: Parabolic Jobber Drill Bit, Dimension Type Metric, Size 8.10mm, Material High Speed Steel, Flute Length 75mm, Coolant Through No, Finish Steam Nitride, Point Angle 130 Degrees , Overall Length 117mm, Decimal Equivalent 0.3189 In., Shank Dia. 8.1mm, List Number 549, Cutting Direction Right Hand, Point Type Notch Point