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Suitable for alloyed and non-alloyed steel, cast steel, cast iron,sintered iron, malleable cast iron, non-ferrous metals, hard plastics. High speed steel drill bit enables up to 40 percent faster drilling. Rate and up to 50 percent lower feed pressure than standard-ground. High speed steel drill bits with a chisel edge. Self-centering split point drill tip means there is no needto pre-punch or pilot drill up to 10 mm diameter.