Drill America DWCT Series High-Speed Steel End Mill, Polished Finish, 2 Flute, Ball End, 3/4" Cutting Length, 5/16" Cutting Diameter, 2-9/16" Length, 3/8" Shank (Pack of 1) High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance Available in polished finish Weldon shanks feature a round shank with one of more flats machined into the side for easy indexing and alignment When run in a counterclockwise 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