The Norton Red Heat 5-7/8" Hook and Loop Sanding Discs with 80 Grit are designed for professional hardwood floor sanding. These discs feature a no-hole design and utilize 100% patented SG (Seeded Gel) ceramic alumina grain, which delivers aggressive cutting, longer life, and a finer scratch pattern compared to standard abrasives. The heavy F-weight backing resists tearing and snagging, making them ideal for the hardest wood species, parquet, and multi-species floors.