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 3/16 to 9/16 in.High-performance carbide for greater durability and cutting performance in metals with a thickness from 3/16 to 9/16 inEnhanced carbide tip to blade connection for extreme impact resistance1 in oversized blade body for straighter cuts with less vibrationPerma-SHIELD non-stick coating for less heat and friction