Waterstone to create abrasive slurry for effective sharpening with less pressure than an oilstone requires<br> Combination stone has 4000 grit on one face for maintaining and refining, and 8000 grit on the opposite face for polishing steel cutting edges<br> Cleans up easily with Water as lubricant instead of oil<br> Blue plastic hinged box with no-slip rubber feet can be used as holder for the stone during sharpening<br> The Japanese-style 4000/8000-grit combination Waterstone creates an abrasive slurry for effective sharpening, with 4000 grit on one face for maintaining and refining a cutting edge, and 8000 grit on the opposite face for polishing cutting edges;<br> This 18*6*3cm (H x W x D) stone, suitable for bench use, cleans up easily with Water, and comes encased in a blue plastic hinged box.<br> The removable box lid, with no-slip rubber feet, acts as a sharpening station to hold the Waterstone in place during bench use.<br> Sharpening stones, or whetstones, are abrasive surfaces used to sharpen and hone the edges of steel cutting implements such as chisels, knives, scissors, hand scrapers, and plane .<br> Sharpening is the process of creating or re-establishing a cutting edge by grinding away portions of the metal to adjust the angle of the edge and reform the shape.<br> Package Contents: 1 x Sharpening stone<br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.