M1rror Edge doesn't sharpen the proprietary Cutco serrations. This is due to the trapezoidal shape. The flat surfaces pose a near impossibility of accomplishing the sharpening task without rounding the sharp corners. Attempting to make a grinding wheel as Cutco uses would be considered patent infringement. M1rror Edge Recommends that you take advantage of Cutcos "Forever Sharp Guarantee". Please see the video below to learn more.