The Faithfull Diamond Sharpening Stone Kit is ideal for quick, easy and effortless sharpening of any blade and many other tools. Its double sided 8mm thick metal stone is electroplated with monocrystalline diamond in two grits, 400G Coarse & 1000G Fine. Each can be easily accessed by simply releasing the stone from the docking station and turning it over. The benefit of this stone over a traditional abrasive sharpening stone is the sharpening surface remains absolutely flat and will not ‘groove’ over time. This is essential in order to provide consistent straight edged on precision cutting tools such as wood chisels and plane irons. Diamond stones will sharpen carbon steel, HSS and tungsten carbide tools and may also be used to abrade glass, ceramic tiles and porcelain and may be used dry or with water as a lubricant. Used for general purpose sharpening of knives, scissors, chisels, plane blades, cutting blades, TCT router bits and any tool that requires a sharp edge.