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Professional-grade fiber disc designed for aggressive material removal and surface preparation. This 4-1/2" Norton disc features 50-grit aluminum oxide abrasive, ideal for grinding, blending, and finishing on wood, metal, and composite surfaces. The 7/8" arbor hole ensures secure mounting on standard angle grinders. Built for durability and consistent performance across demanding applications, this disc delivers reliable results for contractors and serious DIYers tackling heavy-duty sanding and grinding tasks.