Genius Crystal Abrasive are high quality abrasive discs with a strong, durable and flexible polyester film backing, premium aluminium oxide grit and strong resin bond for faster and sharper cutting performance. The very fine cut leaves surfaces perfectly uniform, ideal for rapid polishing. Quickly eliminates orange peel, nibs and other defects, long lasting and ensures a high quality-finish.77mm No hole discs, 50 per box.