LENOX Tools 21070818GR Gold Power Arc Reciprocating Saw Blade, For Medium Metal, Sheet Metal Cutting, 8-inch, 18 TPI, 5-Pack Delivers up to 2X longer life versus traditional straight LENOX reciprocating saw blades. The aggressive curved blade design optimizes the blade's angle of attack for faster cutting in a variety of materials. T2 Technology and a precision-applied titanium coating help dissipate heat, extending the life of the blades. Available for wood, metal, demolition, and extreme heavy metal cutting applications. 18 tooth per inch blades are best for use with medium-thickness metals. Made in the USA of global components.