Dremel Tungsten Carbide Cutters - Dremel 2615990532, These tungsten carbide cutters from Dremel are ideal for shaping, smoothing and removing unwanted material on a variety of substances. They can be used on hardened steel, stainless steel, cast iron, non-ferrous metals, fired ceramics, plastics, hardwoods and many other hard materials. Dremel 2615990532 9905 3.2 mm Tungsten Carbide Cutter Ball Tip - Single