Shopsmith Ceramic Abrasive Sandpaper Discs cut fast, resist build-up, and outlast the competition. These discs are workhorses in the shop, easily handling tough sanding jobs, tool sharpening, and more with superior durability and performance. Made with a durable, open coat Ceramic abrasive that is fast-cutting and resistant to loading for a longer life. Includes (4) 12 Inch, 100 Grit, Adhesive-Backed Ceramic Sanding Discs.