* Progressor for Metal blades offer fast cuts and long life in thick or thin metal pipes and metal profiles* Basic for Metal blades are the economical choice for cutting sheet metal and thin metals (ferrous and non- ferrous)* Flexible for Metal blades are break resistant and durable and suitable for sheet metal and medium-thin metals (ferrous and non-ferrous)* 1/4? universal shank (U-shank) blades are suitable for jig saws from Skil, Black & Decker and others* When cutting metal, remember to use cutting oil, turpentine or a mixture of turpentine & petroleum oil to cool jig saw blade