Features and Benefits:?FANG TIP ??Matrix II bi-metal teeth for greater durability?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?Ordinary tips bounce or skate on the work piece FANG TIP ? bites into the wood on first contactMilwaukee? wood cutting SAWZALL? blades have been engineered to deliver the fastest cuts, longest life, greatest tooth durability and quickest plunge cuts of any wood blade on the market.