FeaturesOptimized tooth design providing 2X more life than our previous generation SAWZALL® blades Tough Neck™ ribs strengthen the blade tang and minimize breakage Grid Iron™ honeycomb pattern increases blade rigidity to resist blade bucklingSAWZALL® blades Tough Neck™ ribs strengthen the blade tang and minimize breakage Ice Hardened™ for up to 50% longer lifeA unique combination of relief angles forms a radius on the back of the tooth that reduces stress build-up during cutting and substantially extends blade lifeA precise manufacturing process creates a sharper cutting edge on each tooth for a faster cutting bladeA thicker more rigid blade body resists fracturing and bending for maximum durabilityMatrix II Bi-metal teeth for greater durabilityBi-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