Vermont American 30210-10 18 Tooth Bi-Metal All Purpose Metal Cutting Reciprocating Saw Blades, 6-Inch Blade Length, 10-Pack Bi-metal reciprocating saw blades last 10 times longer than high carbon steel blades and twice as long as high speed steel blades A flexible, steel spring back extends the life of the blade Super-hard high speed steel teeth provide a sharp, long-lasting cutting edge