6 in., 9 in. General Purpose Bi-Metal Reciprocating Saw Blade, 15 Pk.These reciprocating saw blades provide fast, aggressive cutting on a variety of materials. The blades are made from tough, shatter resistant bi metal that keeps the edge longer on your reciprocating saw blade and withstands even rough cutting jobs. The heat treated saw blades can handle nail embedded wood, sheet metal, thick metal and demo work. Perfect for cutting nail embedded wood, sheet metal, thick metal and demo work High quality M2 Bi metal