The 464 knife sharpener from Chef's Choice is the fastest manual knife sharpener available for 20 degree edges. The professional sharpener has 2-stages for sharpening and honing-polishing for a super sharp arch shaped edge. It has 100% diamond abrasives in both stages 1 and 2 and features Chef's Choice's criss-cross sharpening technology for the sharpest edge you can imagine. The 464 knife sharpener can be used for both straight edge and serrated knives, kitchen and household knives, as well as pocked and sports knives. The sharpener provides precise bevel angle control and has a soft-touch handle for a comfortable and secure grip.