Diamond Disc 100mm diameter
The outer diameter of the diamond disc is 100mm and the inner hole diameter is 20mm. It is used in grinding of precious, semi-precious stones (ruby-sapphire-emerald, glass hardness etc.). In addition to metal, it abrades all kinds of metals, including silicon carbide (tungsten). It is very different from the similar ones in the market ; the difference is not the coating, but it is the cold press method is used to attach the diamond content to the surface.This disc can be used for polishing &grinding precious semi precious ruby, quartz, agate, opal, topaz, marble, etc.