Michigan Drill taper shank drill bit. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. 135 degrees split/notched point. Morse taper shank allows the tool to be inserted directly into the machines spindle to facilitate high-torque applications such as large cut diameters. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 7/16-inches size. These premium cobalt drills exhibit greater toughness, abrasion resistance and higher red hardness than the standard high speed drills. They are recommended for use on hard-to-machine materials where longer tool life is desired.