Features and Benefits: ?Ordinary teeth deliver either speed or durability NAIL GUARD? solves this trade-off with an aggressive 5 TPI pattern for faster cuts and a unique design that protects against tooth fracture ?A thicker, more rigid blade body resists fracturing and bending for maximum durability ?FANG TIP ? ?Matrix II bi-metal teeth for greater durability ?NAIL GUARD ? ?Ordinary tips bounce or skate on the work piece FANG TIP ? bites into the wood on first contact ?The 1″ tall blade body reduces blade twisting for straighter, more accurate cuts ?FANG TIP ? Ordinary tips bounce or skate on the work piece FANG TIP ? bites into the wood on first contact ?NAIL GUARD ? Ordinary teeth deliver either speed or durability NAIL GUARD ? solves this trade-off with an aggressive 5 TPI pattern for faster cuts and a unique design that protects against tooth fracture The Ax? SAWZALL? blades have been engineered to deliver the fastest cuts, longest life, greatest tooth durability and quickest plunge cuts of any wood demolition blade on the market.