Jooltool 3M Trizact discs are the best honing abrasives on the market. Produced with 3M's microreplication technology, the micropyramids deliver fast, consistent cutting action through their long life. Fantastic results on jewelry; Ninja Trizact discs perform better than emery paper and fills porosity. Also works great on plastics and for glass defect repair. Colors can include . The discs have peel-and-stick backs for sticking to either the Ninja Cushion or Jooltool back pads. Can be used wet or dry. Package of 12 discs, 3 of each grade including 35, 20, 10 and 5 microns.