The tool is abrasive

Abrasive materials (fr.abrasif — grinding, from lat.abradere — to scratch out) are the materials having high hardness, and used for processing of a surface of various materials. Abrasive materials are used in processes of grinding, polishing, a honingovaniye, superfinishing, cutting of materials and widely applied in procuring production and final processing of various metal and nonmetallic materials.