Features KLEIN TOOLSReciprocating Saw Blade Set 5 piece 8 Inch 18TPI Metal. Thin Kerf metal-cutting blades with the Double Duty Upgrade feature a tooth form that is optimized for the longest life and increased speed. Engineered to protect against tang breakage and delivers the strongest blade tang on the market. Maintaining a short profile and thin body, these blades are ideal for making fast, flexible cut. Includes (5) metal blades.