Description:  3000/8000 4000/1000 Grit Whetstone Sharpener Dual Whetstone Sharpener.     Features:  - Double-sided sharpening design.  - Suitable for coarse grinding, grinding, edge, fine grinding.  - Equipped with silica gel non-slip base guarantee the safety sharpening.  - Small number side for grit coarse sharpening , Large number side for fine sharpening.  - Good choose for Kitchen stainless steel knife, precision tool, Sushi knife and so on.    Specifications:  Product Name:Knife Sharpener;  Material:White Corundum;  Grits: A: 1000 /4000 ;  B: 3000 /8000 ;  Size:21x9.1x5cm/8.26x3.58x1.96in;  Quantity:1Pcs;     Use instructions:  Firstly, soak into the water for 15 minute.  Then sharpening as coarse first, later fine grinding.  Don't Scrape off the starch solution, it will help sharping the knife.  Package Included:  1 xWhetstone;  1 xNon-slip Base