... :100mm,115mm,125mm,150mm,180mm,230mmGrit:40#~400# Characters: The fiber discs have high surface removal rate, long service life and optimum ... of machines and with a variety of hole patterns. These discs are suitable for use on steel, stainless steel, metal, NF ... metals, wood, plastic, marble and cast iron. Use these discs, even the most difficult surface can be worked and finished ...