The fast and easy way to sharpen kitchen and sporting knives. Also sharpens Santoku knives. The adjustable blade selector provides the optimum sharpening angles. Select thick for hunting knives medium for chefs knives and standard kitchen knives and thin for light blades like fillet and paring knives. So easy simply draw the knife through each slot a few times to achieve a razor sharp edgeStage 1 begins the sharpening process with a Sapphirite coarse-grinding wheel to create the proper angleStage 2 continues sharpening with a Sapphirite medium-grinding wheel that gives the blade a precision edgeStage 3 completes the process with an extra-fine-grit ceramic wheel that polishes the blade to an exact razor-sharp edge10/01/2010header1 Year Limited Warranty