New 5-Piece Carbide Reciprocating Blade Set consists of three Demo Demon blades for nail-embedded wood and two Steel Demon blades for metal cutting, including high strength alloys, cast iron and stainless steel. This combination carbide reciprocating blade set allows PROs to blaze through nail-embedded wood with amazing ease to facilitate fast teardowns of walls and framing materials, and slice through metal so you can quickly dismantle a variety of pipes, bars and beams up to 1/2 in. thick.