GUHRING 9005490065300 Jobber Bit, F, High Speed Steel. More details: Parabolic Jobber Drill Bit, Dimension Type Letter, Size F, Material High Speed Steel, Flute Length 2-7/8 In., Coolant Through No, Finish Steam Nitride, Point Angle 130 Degrees , Overall Length 4 In., Decimal Equivalent 0.2571 In., Shank Dia. 6.53mm, List Number 549, Cutting Direction Right Hand, Point Type Notch Point