Precision Twist S209 High Speed Steel Taper Shank Drill Bit, Black Oxide Finish, Morse Taper Shank, Spiral Flute, 118 Degree Point Angle, 1 11/16" Long length drill bits (also called taper length), have longer flutes and overall lengths than Jobber drill bits Morse taper shank, secure and accurate tool-holding system 118-degree conventional point angles good for general drilling applications Black oxide finish, improves lubricity, resists corrosion, and will not chip or flake off High-speed steel, for use on a wide variety of materials