United Abrasives- SAIT 78111 Ovation Flap Disc, 4-1/2-Inch by 5/8-11-Inch, 120 Grit, 10-Pack Heavy duty for tough applications Use on carbon and stainless steel, will not contaminate stainless steel Made with premium zirconium abrasive material which provides long-life and high stock removal High pressure is ideal for removing deep scratches on the work surface