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Bona's 6" blue disc in 36 grit delivers aggressive material removal for initial sanding passes on hardwood floors. The coarse grit efficiently strips old finishes, stains, and surface imperfections, making it ideal for floor preparation and leveling. Designed for use with Bona's sanding equipment, this durable disc maintains consistent cutting action across the work surface. The 36 grit rating provides the aggressive action needed for heavy-duty applications while the 6" size offers optimal coverage for efficient floor refinishing projects.