Knife Sharpener Stone, TTOBS 400 / 1000 Grit Two-sided Whetstone, Household Tool Sharpening Stone Outdoor Knife Sharpener Kitchenware fit Sharpening and Polishing Edges DOUBLE-SIDED 400/1000 knife sharpening stone: the oilstone, adopt the white corundum, so it is high hardness and wearproof, corrosion-resistant, heat-resistant and it has those characteristics of fine texture, sharpening force ensure, and sharpening speed EASY TO USE: Just put the whetstone into the water around 5 minutes, so that sharpening whetstone fully absorbs moisture. Pay attention to the angle of sharpening, then finish honing with the fine BROAD APPLICATIONS: Whetstone set can be used in Hone and kitchen cutter, outdoor knife, precision tool, Such as kitchen knives, kitchen shears, pocket knife, Shun chef knife, porting knives, straight razor, cutting class knife grinding, precision tool, garden tools and art appliance, but EXCEPT serrated blades and ceramic knife etc SECUIRTY: Equipped with silica gel skid base, not only beautiful and high safety. its non-slip feature, make you in the process of sharpening, the whetstone with the interface is fixed, so make sure the knife won't be hurt the hand NOTE: Soak the stone in the water for 5 minutes and then put it on a steady surface such as a table or desk. Do not rinse away all the slurry on the stone surface since it's helpful to make the knives sharper Firstly,you need to put the Whetstone into the water around 5 minitues. Secondly,according to the types of knives,the purpose of the tools,please notice that the angle when you sharpen your knife. Finally,please don&#039;t wash sharpening stone before ending grind your knife.