Combination Stone(600/1000Grit) T0915W is the least aggressive sharpening stone. The fine whetting material only removes some amount of knife burring and produces a razor sharp edge. The broad surface with the porous structure of the sharpening stone continuously releases small particals during the sharpening process. It is indestructible to edges and specially perfect for kitchen knives, woodworking tools or garden tools. Besides, different grits and sizes stones are available for users'choice. As knife sharpeners both suit to use water and non-petroleum oil .Also it comes with suitable silica gel base to ensure stable when sharpening.