Check the listing for details. CLE-LINE C23339 Jobber Drill,U,Cobalt 53PR24. Condition: New. Listed at 16.83 USD. Jobber Length Drill Bit, Drill Bit Size U, Drill Bit Point Angle 135 Degrees , Cobalt, Straw/Bronze, Decimal Equivalent 0.3680, Letter, Drill Bit Point Type Split Point, Non-Coolant Through, Number of Coolant Holes 0 These drill bits have a straw/bronze finish that improves their wear resistance. They also have spiral flutes that evacuate chips as the bits drill into a workpiece.Cobalt jobber-length drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel drill bits. They provide some shock absorption and can be used in handheld power tools. Jobber-length drill bits are the most commonly used drill-bit length. They provide a good balance of strength and accuracy when drilling into a variety of materials.