Zwilling 4-Stage Pull Through Knife SharpenerZwilling J. A. Henckels Manual Knife Sharpeners feature a German engineered design that utilizes course and fine ceramic grits to let you manually maintain the sharp cutting edge of Western and or Asian style cutlery Manual 2 slot sharpener is suited for use on Western style knives Manual 4 slot sharpener is suited for Western and Asian style knives Sharpener comes with a unique safety grip that ensures fingers stay safely away from the knife blade