“Recommended” by Cook's Illustrated, a leading consumer and kitchen testing publication, the Chef’sChoice® Pronto® Manual Diamond Hone® Sharpener Model 463 is affordable, easy to use, quiet and extremely fast. extremely sharp, better than factory 15 degree edge on 15 degree class knives, including Santoku and other Asian-style double-sided knives contemporary Euro/American style knives. The Chef’sChoice® Model 463 helps prolong the life of quality knives because it creates a super sharp 15˚ double-bevel arch-shaped edge that resists dulling longer than conventionally sharpened hollow-ground or “V-shaped” edges. Its fast and the edge that it applies is sharp and long- lasting with a “bite” that slices smoothly through both fibrous and non-fibrous foods. Using the Chef’sChoice perfected CrissCross® technology; this 2-Stage sharpener develops an extremely sharp double-bevel edge with microscopic “teeth” along the entire cutting edge. These tiny teeth provide the “bite” on the edge and work to instantly engage the food for effortless cutting.