This reciprocating saw blade offering from Irwin has a blade for every application, IRWIN blades offer superior construction and design making them faster cutting and longer lasting.These blades have the following specification:Blade Type: Metal Cutting, 818R, 200mm x 18tpi. Cuts all metals including non ferrous, pipe conduit, stainless and sheet metal. Suitable for use with materials 1.5 to 10mm (1/16 inch to 3/8 inch) thick, dependent on the TPI of the blade.The Irwin IRW10504156 Sabre saw 818R metal cutting blades (200mm) comes in a pack of 5 with 18TPI.