FeaturesOptimized tooth design providing 2X more life than our previous generation Sawzallâ„¢ bladesTough Neckâ„¢ ribs strengthen the blade tang and minimize breakageGrid Ironâ„¢ honeycomb pattern increases blade rigidity to resist blade bucklingBi-metal blades feature a toothed edge made from high speed steel (HSS) attached to a flexible steel backing through an electron beam welding process, this configuration results in a blade that makes precise cuts while resisting breakageStraight-backed blades are used for cutting straight edgesThe cutting surface of a toothed edge is composed of a row of pointed teeth