"Thin kerf metal-cutting blade with Double Duty Upgrade features an optimized tooth design that provides the longest blade life and increased speed. Tough Neck ribs strengthen the blade tang to protect against blade breakage. With a short profile and thin body, this blade is ideal for making fast, flexible cuts. Matrix II bi-metal for durable wear. Made in U.S.A. Blade Material Bi-metal, Blades qty. 5, Reversible Yes, Tang Size in. 1/2, Tang Style Universal, Blade Size in. 9, Blade Type Straight back, TPI Teeth per Inch 18, Blade Application Metal, conduit, tubing, channel, pipe. Matrix II high-speed steel teeth with 8 cobalt For cutting metal 1/8in. thru 3/16in. conduit, tubing, channels and pipe Tough bi-metal design for fast-cutting, long-lasting blade life 1/2in. universal blade tang fits all Sawzalls Blade reversible in clamp"