... bit, step drills, taper shank drills, and drill bit with coolant holesSize: standard and non-standardLength: normal length, extra length, ... specialMade of tungsten carbide, HSS, HSS-co (m42, m35, and m2)Workpiece: carbon steel, alloy steel, cast steel, tooling steel ... and non ferrous alloyWe also can produce special tools according to requirements of drawings or samples Step Drill, Made in HSS, and ...