Bosch T5002 T-shank Jig Saw Blade Set (10 pc). Features 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 when there 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.