Bi-metal blades feature a toothed edge made from high speed steel (HSS) attached to a flexible steel backing through an electron-beam welding process. This configuration results in a blade that makes precise cuts while resisting breakage.

M42, also known as high speed steel (HSS), provides good wear resistance and can be used in general purpose applications for both ferrous and nonferrous materials.

The cutting surface of a toothed edge is composed of a row of pointed teeth. Common tooth variations include the number of teeth per inch and pitch pattern. They are used on ferrous and nonferrous materials.