50 Pack - 3" 40 Grit Zirconia+Grind Aid Quick Change Sanding Discs Type R Roloc

Fastener: Type R - Male Roll On (Equivalent to 3M Roloc fastening system). Sanding Belts. Quick Change Discs. Material: Zirconia with Grinding Aid. Suitable For: carbon steel, cast iron, titanium, aluminum, brass, bronze, copper or hard woods and can also be used on stainless steel, cobalt alloys and nickel alloys.