5-Piece Carbide Reciprocating Blade Set consists of three Demo Demon blades for nail-embedded wood and 2-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 9/16in. thick. Diablo's high performance carbide set delivers unmatched 50X longer cutting life than standard bi-metal blades, greater durability in cutting applications and an oversized body height for straighter cuts with less vibration.