M2 and M35-Cobalt(E) HSS saw blades are available in many different configurations. These blades are heat treated and press quenched to ensure flatness and low runout. The "E" designates a higher quality material, which is additionally alloyed with cobalt. Metal cutting circular saw blades in this grade of steel are used for materials which are difficult to machine such as stainless steel, titanium or other material grades with higher strength. This material is also perfectly suited to all applications in which longer blade life is needed.