2-level sharpening system: designed with a two-level sharpening system, coarse sharpening for dull knives, fine sharpening for polishing the blade. Knife sharpener Exterior: This mini knife sharpener is made of plastic and stainless steel, which is environmentally friendly and durable. Kitchen accessories: This mini knife sharpener is not only suitable for cooking, but also for camping, hiking and other outdoor activities. Wide compatibility: Heavy-duty construction can sharpen any type of knife, including kitchen knives, utility knives, paring knives, sharpeners, planers, boning knives, roughing knives and hatchets, but not suitable for serrated blades (like bread knives). Knife sharpener key ring: with a key ring. Prepare for your next outdoor adventure with this pocket knife sharpener.