Detail of the Triangle Sanding Sheets: Equilateral triangle shape 90mm*90mm*90mm.6 holes design for dust extraction, avoiding obstructions and easy to use. Detail of the Different Grits: The smaller numeral of the grain, the larger of the sand particles,It's represents very rough.And the larger number of the grits,the smaller of the sand particles,It's represents very fine.Different grains sandpaper for sanding different things. Multipurpose:Suitable for grinding, polishing and derusting.It can be used in wood,metal, plastic, stone, rubber, glass and other materials etc.It also can be used in grinding wood, floor, and make swing. High Quality Workmanship Material: Small triangle sandpaper can deal with the tiny place.Polish the rough edges and corners of the table with power tools. Hook and loop backing paper,strong adhesion without degumming,easy and quick to stick,sturdy, durable and practical.