Diablo 5-Piece Carbide Reciprocating Blade Set consists of 3 Demo Demon blades for nail embedded wood, 2 Steel Demon blades for metal cutting and 1 bonus blade. The combination carbide reciprocating blade is designed to easily cut through high strength alloys, cast iron and stainless steel plus allows pros to blaze through nail embedded wood with amazing ease to facilitate fast teardowns of walls and framing materials as well as slices through metal so you can quickly dismantle a variety of pipes, bars and beams up to ½”. Innovative design delivers an unmatched 50X longer cutting life, greater durability in cutting applications and the oversized body height delivers straighter cuts with less vibration.