Sawzall blade set features an assortment of standard wood and metal cutting blades for a broad range of professional applications. Wood blades feature Nail Guard , which combines an aggressive 5 TPI pattern for faster cutting and a unique design that protects against tooth fractures, plus Fang Tip design which bites into wood on first contact for faster plunging. Matrix II bi-metal teeth for greater durability. Double relief angle reduces tooth stress for long life. Set includes (2) 6" wood cutting blades for increased control, (1) 9" wood cutting blade for greater cutting capacity, (3) 6" 14 TPI blades for medium to thick metal cutting and (3) 6" 24 TPI blades for thin metal cutting. Set also includes a durable case for convenient blade storage.