The Faithfull Triangular Diamond Sharpening Stone is a highly effective whetstone for sharpening blades and other tools with minimal effort. It has three sides with varying coarseness of diamond grit. The 150# and 325# sides are ideal for coarse sharpening, while the 1200# side provides the blade with a finished edge. Comes with a plastic base featuring non-slip pads on each end to keep it stable during use. Diamond stones are suitable for sharpening carbon steel, HSS, and tungsten carbide tools, as well as for abrading glass, ceramic tiles, and porcelain. They may be used dry or with water as a lubricant. This versatile sharpening tool is perfect for sharpening knives, scissors, chisels, plane blades, cutting blades, TCT router bits, and any other tool requiring a sharp edge.