Professional chefs might be highly-strung types, prone to passionate arguments, but when it comes to Global knives, chefs everywhere can agree that these knives are the best around. So they need a little bit of extra special treatment, those Global knives. To keep them looking their best, it's recommended to use a whetstone or sharpening system that are approved for use with these serious knives, assuring a keen, sharp blade and a lifetime of use. The King Whetstone 800 Grit is made from ceramic, and is super simple to use. Just soak it in water for three to five minutes in order to lubricate the stone, and then begin honing your knife, keeping it at a 15 o to 20 o angle as you work. The 800 grit is suitable for everyday repairing and reshaping, keeping your knives in good working order, and can be followed up with a finer waterstone to finish the job. When you're working with the best, it needs the best treatment after all! Features: Made in Japan. Made from ceramic. Rough 800 grit for repairing nicks and reshaping. Use with water rather than oil, soaking it between 3 - 5 minutes. Shape blade at a 15 o - 20 o angle while working. Wash and dry knives after use on stone, and allow stone to dry. Dimensions: 21 x 7 x 6cm.Please ensure you read the care and use instructions that come with the product prior to using it.