The 2100 electric knife sharpener from Chef's Choice is designed for commercial kitchen use in restaurants, hotels, food service establishments, and grocery stores. The revolutionary 3-stage sharpener with Edge-Select features allows you to choose the edge to match the cutting task. The knife sharpener is super fast and its diamond abrasives and ultra-fine stropping stage ensure amazingly sharp edges within seconds. The sharpener comes with a rugged sharpening module for 20 degree knives and detaches easily for cleaning in your sink or dishwasher. The commercial 2100 knife sharpener sharpens all 20 degree knives, straight edge and serrated, kitchen knives, butcher knives, pocked and sporting knives, and even meat cleavers. The sharpening module for 15 degree and ceramic knives can be purchased separatel. This Chef's Choice commercial knife sharpener is NSF certified and due to is advanced Trizor-Plus triple-bevel edge, edges sharpened with it stay sharp up to 3 times longer.