Taidea offers an all purpose, double-sided diamond folding pocket sharpener. This sharpener has a coarse 360 grit and a fine 600 grit, each with advanced diamond grit technology. The coarse surface grit will quickly restore a damaged or dull edge and the fine surface grit allows you to bring back a razor sharp edge.  The two stage sharpening with a continuous surface is an ideal all-purpose sharpener. It will sharpen the toughest materials, including tool steel, carbide and ceramics. The sharpener has two diamond surfaces and is ideal for machine tools, woodworking tools, garden tools and all cutlery knives. Sharpen dry or with water.