Spyder 20001 7 by 7 TPI Bore-Blade This product is easy to use. This product is highly durable This product is manufactured in China. Universal Blades fit all reciprocating saws 6-Inch - 7TPI (bottom)/7TPI (top) - Wood 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