Product Description Lasting up to 50% longer*, these Metal-Cutting Reciprocating Saw Blades feature a patented toothform that delivers fast, smooth cuts for a range of metal cutting applications. Their Bi-Metal construction is designed to extend blade life and minimize blade breaks. From the Manufacturer For cutting mild steel (under 1/8 inches), galvanized pipe, aluminum pipe and channelReciprocating saw blades are used for cutting a wide variety of materials ranging from wood and metal to plastic and drywall. In general, lower tooth counts cut faster, but provide a rougher finish. Blades will fit all brands of reciprocating saws. 2 pack.