This product is produced by the advanced technology introduced from abroad in the 1990s, with good elasticity and cutting force, wear resistance and other advantages, is mold manufacturing, tool repair, all kinds of workpiece bending, holes and common abrasiveness is difficult to reach the surface, it is one of the most ideal abrasiveness, is other oil stone can not be replaced, the price is only one third of foreign imports. Specifications are 100*2-10*0.5-1.2, particle size is 320#-1200#.

Ruby is a kind of corundum microcrystal made from aluminum oxygen powder by sintering at high temperature. The structure is compact and delicate, with high hardness and strength. Because it is a sintered product, it does not have various hardness levels, particle size and different strength ranges, but there are dense structure and porosity structure, so the product logo organizational structure, the product is rose red.

Boron carbide is a hard black shiny crystal. The hardness is lower than industrial diamond, but higher than silicon carbide. The granularity of the whetstone is between 400 and 1000. The smaller the granularity, the rougher, the greater the grinding amount. It is used for the grinding of semi-formed tool. Because of its strong hardness, especially wear-resistant, not easy to scratch.