Item Type: Fixed Angle Sharpener + Whetstone Material: Aluminum alloy + white corundum Size of Fixed Angle SharpenerApprox. 103mm / 4.1in Approx. 280mm / 11in Approx. 104mm / 4.1in Approx. 79mm / 3.1in Size of Whetstone MonomerL: Approx.182mm / 7.2in W: Approx. 60mm / 2.4in H: Approx. 29mm / 1.1in Model: None Color: Fixed Angle Sharpener: Black Whetstone: Blue and white Whetstone: 6000 mesh/1000 mesh(The mesh number refers to the size of the whetstone, that is, the thickness of the particles. The smaller the mesh, the thicker the surface, and the larger the mesh, the finer the surface.) Use Process of Whetstone: 1. Soak the whetstone in water for 5 minutes to fully absorb water. 2. Scientifically sharpen the knife in the order of first rough grinding and then fine grinding, place the sharpening stone steadily, and then polish it back and forth according to the angle of the blade, and rub it repeatedly. 3. There is no need to scrape off the mud when sharpening the knife, and the effect of sharpening is better when there is water. 4. Rinse well after use, and place it in a cool place to air dry.