1.: 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. 2.Suitable for a Variety of : 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. 3.&Reasonable Design: Electric knife sharpeners for kitchen knives with professional precision sharpening slot design, create incomparable durable and sharp blade, bring you amazing knife sharpening effect. 4.Easy to Operate: There are 3 rotational speeds to choose from. Only to clip the knife into the slot and pull the knife in one direction. Just sharpen at each slot 3-5 times to restore the sharpness of the knife.