Designed for cutting thin sheets. The PRO Thin Metal S325GF reciprocating saw blade has been specifically developed for cutting very thin metal sheets, such as those used in heating and air conditioning work. The unique tip is designed to penetrate the sheet directly like a bayonet before the saw is started. The very fine teeth then cut smoothly through the material. This blade significantly outperforms conventional sheet metal shears and other saw blades. The advanced bi-metal construction of the PRO Thin Metal S325GF blade consists of hardened HSS, which offers impressive durability even in steel sheets. It is equally suitable for cutting non-ferrous metals like copper sheets and is the best choice for heating, ventilation, and air conditioning installations. Compatible with all reciprocating saws with an S-shank.