Tapered diamond rods have long been a solution for sharpening serrated knives. The varying radius allows them to fit nearly any serration. The KME tapered diamond rod screws onto the guide rod included in their KME Knife Sharpening System so you have the same guidance as when you use the standard stone carrier. So all you have to do is mount your blade in the knife sharpening jig and touch up all the serration grooves.
The rod tapers from roughly 0.25" to 0.08"
Please Note: The guide rod, sharpening system, base and spyderco are not included when you purchase this tapered rod.