Presto Professional Ever Sharp Three-Stage Electric Knife Sharpener 08810 Grey gives professional sharpening results at home on kitchen and sport knives. Sharpen kitchen and sport knives quickly and easily with a blade thickness selector that adjusts the guides to the optimum sharpening angle. Select thick for hunting knives medium for chef s knives and standard kitchen knives and thin for light blades like fillet and paring knives. It even sharpens Santoku knives. The 3-stage process begins with a Sapphirite coarse-grinding wheel to create the proper sharpening angle. Stage 2 sharpens with a Sapphirite™ medium-grinding wheel to give the blade a precision edge. Stage 3 completes the process with an extra-fine-grit ceramic wheel that fine hones the blade to a razor-sharp edge. Precision guides hold the knife at the perfect angle for no-guess sharpening. Simply draw the knife through each slot a few times and it’s razor sharp. Suction cup feet provide added stability when sharpening. Dimensions: 13.50” W x 5.75” D x 4.50” H weight 4.46 lb.