Check the listing for details. CLE-LINE C22719 Jobber Drill,C,HSS 4F499. Condition: New. Listed at 3.63 USD. Jobber Length Drill Bit, Drill Bit Size C, Drill Bit Point Angle 118 Degrees , High Speed Steel, Black Oxide, Decimal Equivalent 0.2420, Letter, Drill Bit Point Type Conventional Point, Non-Coolant Through, Number of Coolant Holes 0 These drill bits come in standard letter sizes. The trade letter size for each drill bit indicates its compatibility with other tools that have the same trade letter size. The 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. These bits have spiral flutes that evacuate chips as the bits drill into a workpiece, and they have a straight shank that installs into a drill chuck or similar toolholder.Non-coolant-through high-speed steel jobber-le.