3M™ Trizact™ Hookit™ Film Disc 568XA uses cerium oxide abrasive mineral. Cerium oxide is an oxide of the rare earth metal, cerium. The average grain size of the particle is measured in nanometers in raw form, thus making it one of the most effective abrasives for final polishing steps on solid surfaces. It is heat resistant and effective as a polishing agent for glass mirrors, plate glass, crystal, television tubes, ophthalmic lenses, precision optics, precious, and semiprecious stone. Proprietary 3M™ Trizact™ abrasives start sharp and stay sharp, resulting in more predictable finishes and improved, consistent results. Use wet or dry to create high gloss level for glass defect repair and solid surface finishing. Micron sized abrasive pyramids produce a high-gloss. Well suited for use on mini random orbital sanders to produce a polish-ready finish.