With medium grit paper H&L center hole vacuum disc features seeded-gel, P-graded ceramic alumina abrasive and a laser-cut vacuum hole system to keep your workspace clean and free of contamination. Ideal for sanding aluminum, fiberglass, wood, and composites, it has a hook and loop back for easy disc changes. Its latex-saturated, fiber-reinforced C-weight backing ensures flexibility and durability, while the open coat and non-pigmented stearate resist loading and color transfer.