This Scanpan knife sharpener is great for everything from keeping your knives in tip top condition every day to bringing blunt knives back to life. Use the Tungsten Sharpener to rengenerate blunt blades the Diamond Sharpener on your knives every 2-3 months and the Ceramic Sharpener everyday to get the most out of your knives. Specifications 3-Stage Tungsten / Diamond / Ceramic sharpener Create razor sharp knives quickly and easily! Gift boxed. Dishwasher safe however it is recommended that you hand wash and dry with a soft cloth.