Features and Benefits:�Double relief angle reduces tooth stress for long life�Matrix II bi-metal teeth for greater durability�Precision forming process creates sharper teeth for fast cuttingThe thin Kerf metal-cutting blades with the double duty upgrade feature a tooth form that is optimized for the longest life and increased speed. Tough neck is engineered to protect against tang breakage and delivers the strongest SAWZALL blade tang on the market. Maintaining a short profile and thin body, these blades are ideal for making fast, flexible cuts.