12", 5 TPI, Sawzall Blade, Nail Guard, Fang Tip, Matrix II Bi-Metal Teeth For Greater Durability, Ordinary Teeth Deliver Either Speed Or Durability, Nail Guard Solves This Trade Off With An Aggressive 5 TPI Pattern For Faster Cuts & A Unique Design That Protects Against Tooth Fracture, Ordinary Tips BOZ Or Skate On The Work Piece, Fang Tip Bites Into The Wood On First Contact, Bulk.