Most HSS and CT blades are intended for sawing hard and soft wood. If you want to cut non-ferrous metals (such as brass, copper or aluminium), plastics, high-pressure laminate (HPL) etc., you should buy a multimaterial blade or one designed specifically for that material. As a rule of thumb, keep in mind that the more teeth a blade has, the cleaner the cut will be. A blade with fewer teeth gives higher cutting speeds.