GUHRING 9011830064000 Jobber Drill, Coolant Fed, 6.4mm, TiN. More details: Jobber Drill, Coolant Fed, 1183, High Performance Grade, Solid Carbide, TiN Finish, Self-Centering Point, Drill Point (Deg.) 140, Metric Size 6.40, Decimal Equivalent 0.2520, Flute Length (mm) 53, Overall Length (mm) 91, Shank Dia. (mm) 8, High-Penetration Rate For Alloy And Tool Steel, Aluminum, Cast Iron, General Steel, Heat-Treated Steel And Stainless Steel