9 in. 24 Grit Zirconium Resin Fiber Discs-25 Pack

9 in. x 24 grit. 7/8 in arbor hole. The choice for sanding and grinding tough materials like cast iron, stainless steel and regular carbon steel. Premium Zirconium abrasive grain. Cuts cool and self sharpens! Toughest and most aggressive grain.