The Chef'sChoice Pronto Commercial Model 465 2-Stage Diamond Hone Manual Knife Sharpener is specifically designed for food service professionals who want a rugged, easy-to-use and extremely fast manual sharpener that will apply incredibly sharp and durable edges on both straight edge and serrated knives. It's the fastest manual sharpener available and is specifically designed for fast-paced commercial kitchens. Using 100% diamond abrasives, 2-Stages and precise angle control, the Commercial Pronto 465 provides a superior and long-lasting edge on 20-degree class commercial kitchen knives, butcher knives, pocket knives and sports knives. It features Chef'sChoice's perfected CrissCross sharpening technology for 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 engage and stabilize the food for effortless cutting. Diamond abrasive wheels simultaneously sharpen into and out of the knife’s edge on each side of the blade for a reliable, burr-free and razor-sharp edge with a long-lasting, arch-shaped finish. Covered by the Chef'sChoice One-Year Limited Warranty.