ToolPro's 9 in. Foam Hook & Loop Backup Pad accommodates a variety of hook and loop sanding discs including 9", 8-7/8 in., and 225 mm sizes, making it a versatile choice for professionals and DIYers alike. It's particularly well suited for drywall finishing, where smooth transitions and surface prep are key. Whether you're working on walls or ceilings, this pad provides a reliable base for consistent sanding performance across multiple surface types.