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The Norton RedHeat 7" x 5/16" disc delivers aggressive 50-grit cutting action designed specifically for edger sanders. Built with RedHeat technology, this abrasive disc excels at fast material removal on hardwood floors, efficiently tackling aggressive sanding tasks. The 5/16" arbor hole ensures secure mounting on compatible edger equipment. Model 55962 combines durability with consistent performance, making it an essential consumable for professional floor finishing operations. Ideal for initial sanding passes and heavy stock removal on wood surfaces.