Electronic beam weld for stronger, longer lasting teeth. 8% cobalt keeps teeth sharp longer. Use with materials 1/8 inch (3.2 mm) and thicker. Cuts composition materials, plastic, pipe, carbon steel, and stainless steel. Bi-metal construction for faster cutting and added durability. Precision-set teeth for faster, smoother cuts. IRWIN Tools Metal and Wood Cutting Reciprocating Saw Blade, 12-Inch, 10 TPI