Tungsten Carbide Cutters are ideal for shaping, smoothing or removing material from especially hard materials. Shapes, smooths or grinds especially hard materials including: hardened steel, stainless steel, cast iron, nonferrous metals, fired ceramics, plastics and hard woodsA high-speed cutter made of tungsten carbide, the hardest material next to diamondsUse higher speeds for hard woods, slower speeds for metals and very slow speeds for plasticsUse the sides of the cutter (rather than the tip) for effective cutting