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. Nail Guard™ solves this trade-off with an aggressive 5 TPI pattern for faster cuts and a unique design that protects against tooth fracture Fang Tip™ bites into the wood on first contact A thicker, more rigid blade body resists fracturing and bending for maximum durability The 1 in tall blade body reduces blade twisting for straighter, more accurate cuts Matrix II bi-metal teeth for greater durability