Scotch-Brite(TM) Clean and Strip Disc D2, 4 in x 1 in x 1/4 in S XCS, 10 per case Two Clean and Strip Discs on a 1/4 inch shank for portable tools. Open web offers rigidity, resists loading for maintenance and cleaning jobs. Safe alternative to wire wheels. Abrasive mineral: Extra coarse grade silicon carbide. Color: Black