12″ 10/14 Tpi Metal & Wood Cutting Reciprocating Blades. Cuts composition materials, plstic, pipe, carbon steel and stainless steel. Use with materials 1/8″ and thicker. Electronic beam weld for stronger, longer lasting teeth. Bi-metal construction for faster cutting and added durability. Precision set teeth for faster, smoother cuts. 8% Cobalt keeps teeth sharp longer.