The Mercer Culinary M15940 is a compact manual knife sharpener designed for on-the-go convenience. This keychain dual sharpener features a tungsten steel coarse sharpening slot for quick edge restoration and a ceramic fine sharpening slot for honing and polishing blades. Its durable polypropylene body includes slip-resistant ridges for a secure grip, while the rubberized top and bottom enhance stability during use. Ideal for chefs and outdoor enthusiasts alike, this sharpener ensures your knives stay sharp and ready for any task.