Diablo's 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 3/16 inch to 1/2 inch the increased blade body height produces straighter cuts with less vibration.