Details Keep your kitchen production moving smoothly by maintaining your blade’s sharp edge using this Choice 8″ coarse / medium grit aluminum oxide knife sharpening stone! It features a coarse side with a 120 grit surface and a medium side with a 220 grit surface that allows you to turn the damaged or blunt blade on your hand tool or kitchen blade into a new sharp edge. The blue and light gray colors help you to easily identify the different grit surfaces. Composed entirely of aluminum oxide, this stone is ideal for sharpening and reshaping hand tools and cutlery, making it an essential tool in your kitchen. For superior performance, this stone requires soaking in water for 30 minutes before use to keep the blade lubricated and cool while sharpening. When sharpening, it is best to first start with the blue coarser grit side to give the blade shape, then end with the light gray medium grit side to sharpen the edge. Transform your damaged or blunt knives into functional tools again using this sharpening stone! Overall Dimensions:Length: 8″Width: 2″Height: 1″ Specs Quantity: 1/EachShipping Weight: 1.1 lb.Length: 8 InchesWidth: 2 InchesHeight: 1 InchGrit Level: 120 – 220 GritGrit Type: Coarse; MediumSurface Material: Aluminum OxideType: Sharpening Stones