* T-shank jig saw blade sets offer ideal asssortments* High carbon steel (HCS) blades are best in softer materials such as wood, laminated chipboard and plastics* High speed steel (HSS) blades are used in metal, aluminum and non-ferrous metal* Bi-metal blades are highly flexible and tough because of a combination of HSS and HCS. Suitable for the most demanding applications whenthere is a risk of shank breakage or when an extremely versatile blade is required. Bosch bi-metal jig saw blades last twice as long as HSS blades and 10 times longer than HCS blades. Used for wood, metal, non-ferrous metals and aluminum* T-shank blades are suitable for jig saws from Bosch, AEG, Dewalt, ELU, Hitachi, Makita, Metabo, Milwaukee and others