The oilstone is used for man-made grinding or a kind of grinding apparatus installed in the special grinding machine, taking porcelain and resin as the bonding agent. There are mainly several types: ordinary,honing, double-sided, ect.

Ordinary oilstones: Taken the shape of square, rectangle, triangle, knife-shaped, cylinder and hemisphere, ect, are widely used in grinding all kinds of tools, dies and parts.
Double-sided oilstones: Taken the shape of rectangle, utilizing the features of two sides of the oilstone being different materials, granularity and hardness to grind tools and cutting tools.
Honing oilstones: Taken the shape of and rectangle, installed in all kinds of honing machines, used in honing and processing of cylinder bodies of automobiles, tractors airplanes and air compressors, ect.