Diablo's Steel Demon Carbide Teeth Reciprocating Saw Blades for Thick Metal are the industry's first carbide-tipped blades designed for extreme cuts in high strength alloys, cast iron, stainless steel and more. These high-performance blades deliver up to 50X longer cutting life compared to standard bi-metal blades across all thick metal applications. Thanks to an oversized blade body, each blade delivers straighter cuts with less vibration and chatter. An enhanced tip-to-blade connection allows for extreme impact resistance, and Perma-SHIELD non-stick coating helps the blade resist heat, gumming and corrosion across all materials.