This amazing manual knife sharpener from Chef's Choice is the fastest manual sharpener available for European, American, and Asian style knives! The 4643 knife sharpener is a professional sharpener for super sharp edges on both your 15 and 20 degree edges. It sharpens both straight edge and serrated knives equally well. The manual knife sharpener comes with Chef's Choice's Criss-Cross sharpening technology and has 100% diamond abrasives in all its 3 stages. The sharpener's precise bevel angle control creates amazingly sharp 15 and 20 degree edges and its separate sharpening and honing/polishing stages ensure a super sharp, arch shaped edge. The 4643 knife sharpener takes care of chef's, santoku, bread, hunting, fillet, and pocket knives.