3M Ninja See-Thru backpads allow you to sharpen, grind or polish with a crisp and clear view of the work piece. Package includes three hard backpads for mounting Ninja polishing and abrasive discs (sold separately). For best results, polishing and abrasive discs should be mounted on their own individual backpad. Ninja backpads are reusable. For use with Jooltool.
Rotary Tools & Accessories>3M>H20-3702TLTools>Jewelers Tools>Rotary Tools & Accessories3Mhttp://www.firemountaingems.com/itemdetails/h203702tlH203702TLBackpad, 3M™ Ninja See-Thru™, plastic, black, 3-inch replacement disc for Jooltool™. Sold per pkg of 3.//image3.fmgstatic.com/images/p3702tlb.jpg40.8140.81As Low As $11.24 per disc