The ceramic purple grinding pack comes with three abrasive discs for work on various non-ferrous and tool steels, as well as sanding wood. This multi-purpose abrasive is made of a self-sharpening ceramic for long life and uniform cutting. Ceramic discs can be used in jewelry-making on precious metals and to grind sprues off of raw castings. The discs have peel-and-stick backs for sticking to Jooltool backpads. Package of nine includes three each of 80, 120 and 220 grit. For use with Jooltool.
Rotary Tools & Accessories>3M>H20-3704TLTools>Jewelers Tools>Rotary Tools & Accessories3Mhttp://www.firemountaingems.com/itemdetails/h203704tlH203704TLAbrasive disc, 3M™ Ninja™, plastic and ceramic, purple, 80-220 grit, 3-inch replacement disc for Jooltool™. Sold per pkg of 9.//image1.fmgstatic.com/images/p3704tlb.jpg31.4831.48As Low As $2.89 per disc