【High-quality Material 】 The grinder head is composed of ceramics, tungsten steel, diamond and the handle is made of stainless steel. This knives sharpener adopt the streamline ergonomic design, so it's more convenience,safer and easier to use compared with the heavy grindstone and sharpening rod.【Removable Grinder Head】 The sharpening of grinder head is removable, you can adjust the grinder head until it's suitable your habit no matter you're a right/left-handed. In order to protect your knives,please pull your knifes only one direction and not move backward/forward.【Non-slip Base& Easy to Use 】 Soufull knife sharpener designed the non-slip base to keep your safety while other sharpener didn't. There are 2 stages for your dull knifes, COARSE is suitable for sharping knife and FINE is suitable for polishing your blades to razor-sharpness.【Multi-purpose Knife Sharpener】Suitable for chef knife, sushi knife, santoku knife,throwing knives, steak knives, pocket knives, steel knives, outdoor knives, Serrated knives, Diamond knives, Tungsten knives, tactical knives, kitchen shears, kitchen scissors and kitchen knife set.【Guarantee for Soufull kitchen knives】Please contact customer service for the first time if you have questions or comments, we will reply you ASAP. If the return is caused by the product quality or the mistake from us, we are fully responsibility for all.