Fallkniven Diamond Ceramic Whetstone DC521

Combination stone from diamond and ceramics comprised of fine diamond (25 micron) and ceramic stone, made from synthetic sapphire. The advantage of these materials is that it, in time, they won't lose their flat surface. In addition, with these hard materials you can even sharpen knives made from extremely hard powder types of steel. The stone does not any water or oil during use. You only occasionally need to clean it with warm water and liquid soap. The stone might feel a little rough at first, but will become smoother during use.