【2 in 1 Knife Sharpener】With the 4-in-1 Knife Sharpener you can sharpen dull knives easily and professionally. Tungsten Steel Blade--Coarse Grinding, Diamond Slot--Fine Grinding .It's the perfect addition to most kitchens! 【Safety Ergonomic Design】Our diamond steel knife sharpener has a 2-step sharpening system that can sharpen your knives to complete sharpness. The first stage of diamond sharpening repairs and straightens damaged blades and the second stage of ceramic sharpening restores and polishes cleanly. Our pencil sharpeners are designed with comfort in mind: the bottom has a non-slip effect. 【Easy, safe and universal use】Our knife sharpener is easy to use. Simply place the blade in the slot and gently pull the knife in one direction several times for fast, efficient sharpening and enjoy your new sharpness in seconds, and with an electronic readout. It is also safe to use, high quality hard steel knives. Be careful not to pull forward and backward, it will damage the knife sharpener. 【Professional Knife Sharpener】 Our Kitchen Sharpener is suitable for sharpening fruit knives, kitchen knives, carving knives, boning knife, etc. (not suitable for ceramic knife or serrated blades like bread knife). Kitchen sharpener is an ideal product to ensure the longevity of your knives.