High Quality: The grinding position is made of tungsten steel, emery, high hardness ceramics and other materials, which can be used for more than 3 years Multi-function: With the 4-level knife sharpener you can sharpen dull knives easily and professionally. Three stage sharpening process (coarse, medium, fine). Keeps your kitchen knives brilliantly sharp. Ergonomic Design: Non-slip rubber base and ergonomic handle bring good cooking experience. We even have protective gloves for added safety! The bottom of the knife sharpener has non-slip rubber bases that prevent slipping during use. Easy to use: Small and practical, easy to use. Just put the blade into the sharpening notch and gently pull the knife a few times, after a few seconds restore your dull knives (Press the knives with some force, pull from its base to the tip, do not push back and continued).