DEWALT Bi-Metal Reciprocating Blades for extreme applications as well as demolition work. They have a bi-metal construction combining HCS and HSS for increased flexibility and durability. Aggressive tooth geometry with a special angle for a fast and effective removal of material especially for tensile and abrasive metals. Universal shank fits all major brands including DeWalt Bosch Hitachi Flex Makita Metabo Skil.These DEWALT Bi-Metal Reciprocating Blades have the following specification: Length: 203mmPitch: 1.8mmMaterial Thickness: 3-8mmPack Quantity: 5PTDDEWDT2353QZ