Global Ceramic Whetstone & Holder Set includes a 5mm Ceramic Medium 1000 Grit Whetstone and a 18/10 Stainless Steel Holder. Stone sharpening is the best way to sharpen your knives. The Ceramic Medium grit stone is great to bring back the razor sharp edge of your knives and it does not need to be soaked. It just needs to be wet. Ceramic stones are harder than waterstones, so it will sharpen your knives quickly. Ceramic stones will last longer than waterstones and will not develop groves. The Stainless Steel holder with its non-slip base provides great stability to your sharpening.