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5'' Redheat Dia Norgrip 50 Grit Sanding Discs Professional-grade diamond sanding discs engineered for aggressive material removal and extended durability. The Redheat Dia Norgrip system features a 50-grit abrasive coating optimized for rapid stock reduction on concrete, stone, and composite surfaces. The 5-inch diameter design fits standard orbital sanders for efficient, consistent results. Norgrip backing technology ensures secure attachment and minimal slippage during operation. Ideal for contractors and fabricators requiring reliable performance on demanding grinding and polishing applications.