<ul></li>Zirconia grit enables 3X faster material removal than fiber resin metal sanding discs</li><br /><li>Premium abrasive cloth provides up to 15 X longer life than fiber resin metal sanding discs</li><br /><li>Type 29 fiberglass backing provides grinding angle of 20-25 degrees</li><br /><li>Zirconia grit enables 3X faster material removal than fiber resin metal sanding discs</li><br /><li>Premium abrasive cloth provides up to 15X's longer life than fiber resin metal sanding discs</li><br /><li>Type 29 fiberglass backing provides grinding angle of 20-25 degrees</li></ul>