Reclaim your blades when cutting gets tough. This exclusive device sharpens your knives in two steps for incredibly sharp edges that last longer than ever before. First run a blade through the conical 100% diamond-coated sharpening disks. Then switch over to the revolutionary stropping/polishing disk to finish the process. Magnetic guides facilitate precise angular control, eliminating guesswork for perfect results. Works on straight edge and serrated knives. Two-year limited home use warranty.