"The Torch recip saw blade is ideal for demolition, plumbing, remodeling and general metal cutting. Cuts pipe, channels, tubing, angle iron up to 4in., plus nail-embedded wood and steel. U.S.A. Blade Material Bi-metal, Blade Size in. 9, Blades qty. 5, Tang Style Universal, TPI Teeth per Inch 10, Reversible Yes, Tang Size in. 1/2, Blade Application Demolition, wood, metal cutting, Blade Type Straight back. Matrix II high-speed steel teeth with 8 cobalt Tough bi-metal design for fast-cutting, long-lasting blade life 1/2in. universal blade tang fits all Sawzalls Blade reversible in clamp"