GUHRING 9055250073000 Extension Drill, Coolant Fed, 7.3mm, FIREX. More details: Extension Drill, Cutting Direction Right Hand, Coolant Through Yes, Solid Carbide, Point Angle 140 Degrees , Point Type Notched Point, FIREX(R) Finish, Dimension Type Metric, Size 7.30mm, Decimal Equivalent 0.2874 In., Flute Length 108mm, Overall Length 146mm, Shank Dia. 8.00mm, List Number 5525