Check the listing for details. CLE-LINE C23149 Jobber Drill,7/16",HSS 2BR33. Condition: New. Listed at 10.61 USD. Jobber Length Drill Bit, Drill Bit Size 7/16 in, Drill Bit Point Angle 135 Degrees , High Speed Steel, Black Oxide, Decimal Equivalent 0.4375, Fractional Inch, Drill Bit Point Type Split Point, Non-Coolant Through, Number of Coolant Holes 0 These drill bits come in standard sizes expressed in fractional inches. They 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' spiral flutes evacuate chips as the bits drill into a workpiece. These bits have a straight shank that installs into a drill chuck or similar toolholder.Non-coolant-through high-speed steel jobber-length drill bits do not have coolant holes, so a separate hose is required to bring coolant to the bits' t.