The Milwaukee The TORCH with Nitrus Carbide for cast iron and other thick metals. This Sawzall blade with nitrus carbide teeth cuts longer, cuts more and cuts faster than traditional carbide teeth products. Nitrus carbide technology eliminates the tradeoff between life and speed of cut compared to traditional carbide teeth blades. Blade delivers 3X the life of existing carbide teeth reciprocating saw blades to continuously make the toughest cast iron removals on the job. With a unique carbide blend, it also outperforms standard carbide teeth blades in common thick metals such as black pipe, angle iron, stainless steel, high strength alloys and rebar.