Task Tools T21820 Tungsten Carbide Reciprocating Saw Blade for Iron, Plastic, Brick, Drywall, Cement Board, 3-1/2-Inch Reciprocating saw blade for cast iron, reinforced plastic, drywall, cement board .031-Inch kerf for eloquent cuts in tough material Tungsten Carbide construction for optimal durability and sharpness Measures 3-1/2-Inch (length)