Diablo DS1208CF3 Reciprocating Saw Blade, 8 TPI, Steel, Perma-Shield | The Diablo steel Demon carbide-tipped reciprocating blades are the first carbide-tipped blades designed for extreme metal cutting; including high strength alloys, cast iron and stainless steel. This high performance carbide-tipped blade delivers unmatched 50X longer cutting life than standard bi-metal blades in extreme thick metal cutting applications between 1/8 to 1/2 in.