Check the listing for details. 5 in 1 Electric Knife Sharpener-3 Rotational Speed Adjustable Knife Sharpener. Color: Gray, Condition: New. Listed at 32.98 USD. Innovative Design: The electric knife sharpener tool has 3 rotational speeds to choose from: LOW, MEDIUM and HIGH. Select the appropriate rotational speed according to the type of knife. 5 in 1 slot design, compared with ordinary sharpeners, this one is suitable for a wider variety of knives and meets more sharpening needs. Suitable for a Variety of Knives: Our electric knife sharpeners are suitable for several kinds of straight blade knives (chef knife, forged knife, meat cleaver knife, sushi knife etc.), serrated knives, ceramic knives, scissors (kitchen scissors, garden scissors, axes, etc.). In addition, a detachable ceramic polishing rod is added for grinding special-shaped tools, and can also be used for polishing.