Just like the sharpness on the your knives ware down over time, so does the stones on knife sharpeners. After a while, the stones on the sharpener break down over time from taking small amounts of blade off. This is inevitable with any sharpener.
The Kyocera Diamond Replacement Wheel for DS-50 is very simple to install. Remove the protective cover from the Knife Sharpener, and lift up on the old wheel and snap the new one into place.
The diamond grinding stone is #600 Grade, and can be used to sharpen ceramic and steel knives. This stone can take up to .5mm nicks off a blade and achieve a 35-degree angle. Along with the diamond stone are the to roller guides that keep the knife from going too deep and over sharpening.
This is to be used only with the Kyocera Electric Diamond Knife Sharpener.
MPN: DS-50 R