Drill America DWCXL series end mill 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. Weldon shanks feature a round shank with one of more flats machined into the side for easy indexing and alignment. When run in a counter clockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. Designed to machine most materials of medium hardness such as steel, brass, bronze and iron.