Jobber Length Drill Bit, Drill Bit Size #36, Drill Bit Point Angle 118 Degrees , Vanadium High Speed Steel, Black Oxide, Decimal Equivalent 0.1065, Wire, Drill Bit Point Type Conventional Point, Non-Coolant Through, Number of Coolant Holes 0 These drill bits have a black-oxide finish that retains lubricants to improve the bits' wear resistance and chip flow. Black-oxide bits should only be used for drilling ferrous metals. The bits also have spiral flutes that evacuate chips as the bits drill into a workpiece.Vanadium high-speed steel jobber-length drill bits are made from high-speed steel, carbon, vanadium carbide, and other alloys. They provide more abrasion resistance and wear resistance than standard high-speed steel drill bits. Jobber-length drill bits are the most commonly used drill-bit length.