Westward 6PRY1 Jobber Length Drill Bit These drill bits are designed to last, thanks to a special TiN coating that protects them from wear and high temperatures. This makes them ideal for working with tough metals such as steel, stainless steel, and aluminum. The innovative parabolic flutes have a wider and deeper design, which efficiently removes chips and keeps the bit cool. This results in faster drilling speeds and cleaner holes, even when working on deep cuts. Drill Bit Size / 4.00 mm Decimal Equivalent / 0.1575 Measurement System / Metric Material - Machining / Cobalt Finish - Machining / TiN Drill Bit Point Angle / 135 ° Drill Bit Point Type / Split Point Coolant Fed / Non-Coolant Through Flute Type / Parabolic Number of Flutes / 2 Flute Length / 43.00mm Helix Angle / 35° to 45° Cutting Direction / Right Hand Spiral Direction / Right Hand Shank Type - Machining / Straight Shank Length / 32.00 mm Overall Length / 75.00mm Depth:Dia. Ratio / 4xD Drill Length Class / Jobber Length Standards / DIN 338 Aircraft Drill / No Drill Diameter Tolerance / +0.0000 inch/-0.0007 inch Sheeter Drill / No Primary Material Application / Aluminum and Non-Ferrous Material; Cast Iron; Steel Primary Material Application ISO Code / K; N; P Maximum Drilling Depth / 1-17/64 inch Shank Diameter / 5/32 inch