Designed for steel and cast iron, DC170 comes in 16xD and 20xD lengths as well as 3xD, 5xD, 8xD, and 12xD dimensions. Custom-made versions are also available. In addition to orienting margins radially and with copper-color finish (DPP Coating) to optimize performance, lands feature shallow cooling grooves at drill end. Coolant flow encompasses entire drill point to benefit both drill and workpiece. Design also maximizes material behind cutting edge for sturdiness and minimized vibration.