Spyder 200018 10 by 14 TPI Bore-Blade, 3-Pack Universal Blades fit all reciprocating saws 10-Inch - 10TPI (bottom)/14TPI (top) - General purpose metal Blade Additional reversed tooth configuration on top of the blade. enables cuts on both the push and pull motion for more efficient cuts Double-edged, 1.23mm thick, bi-metal steel blade allows multi-directional cuts without flipping your saw over saving time and energy Rounded tip with teeth allows plunge cuts eliminating the need for pilot holes