Left Hand Black Oxide Surface Treated Screw Machine Length Drills Applications: Primarily designed for machining operations in screw machines Short length offers increased rigidity for machine drilling a variety of materials and alloys Best suited for drilling steel, cast steel, cast iron, or other alloyed or non-alloyed ferrous materials, they also work well for a variety of non-ferrous and non-metallic materials May be used with hand held manual drills and either portable or stationary machines For optimal performance and the best tool life, suitable lubricating/cutting oils or the ...