We manufacture 3Mâ„¢ Trizactâ„¢ Hookitâ„¢ Film Disc 268XA using proprietary micro-replication technology where micron-graded aluminum oxide particles are formed into tiny pyramids of abrasive mineral and then coated on a film backing. As these pyramids wear, fresh, sharp mineral is continually exposed to produce a consistent cut and a predictable, fine finish.