APR0124 Is a replacement for the Shun Kai Electric Shun Sharpener AP123. APF0118 Is The Shun Kai Electric Sharpener Fine Whetstone Module which is compatible with the Shun Kai Electric Knife Sharpener and can be added to the sharpener for a final finish after using the coarse and fine wheels. Easy to install, it also washes clean in seconds. This complement offers a finer grinding