FeaturesThin kerf for up to 35% more cuts per charge vs leading reciprocating saw bladesShort blade length for cutting in tight locationsBi-metal construction for increased tooth durability and long blade lifeCuts wood and nail embedded woodThin kerf design reduces the amount of drag and resistanceThese blades fit the new M12™ , 2420-20 HACKZALL® reciprocating sawBi-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 breakageThe cutting surface of a toothed edge is composed of a row of pointed teethConstant pitch pattern