Diablo DS0920BF25 Steel Demon 9 in. Reciprocating Saw Blade (25-Pack) Bi-Metal Reciprocating Blade deliver 4x the performance of standard blades. Dual Tooth Design Bi-Metal blades with Perma-SHIELD Non-Stick coating Ultra-Hardened cutting edge with hardness to HRC62 for maximum durability and speed. For Cutting Steel and Metal Composites up to 1/8-inch 25 Blades Per Pack