These Milwaukee Replacement Reciprocating Sawzall Blades feature Matrix II high-speed steel teeth with 8 cobault and are excellent for cutting all woods, nail-embedded woods, composition material, plastic, and ferrous and non-ferrous metals. TPI Teeth per Inch 10, Reversible Yes, Tang Style Universal, Tang Size in. 1/2, Blade Material Bi-metal, Blade Application General applications, Blade Type Straight back, Blades qty. 5, Blade Size in. 6. Matrix II high-speed steel teeth with 8 cobalt For cutting all woods, nail embedded woods, composition material, plastic, ferrous and non-ferrous metals Tough bi-metal design for fast-cutting, long-lasting blade life 1/2in. universal blade tang fits all Sawzalls Blade reversible in clamp Model 48-00-5092 U.S.A.