Hook & Loop surface conditioning discs are constructed of non-woven synthetic fiber coated with aluminum oxide grain. Discs resist loading for long life without damage to or removal of base material. Used in a wide variety of applications such as cleaning, polishing, blending and deburring. Hook & Loop fastening system allows for quick changes and less downtime. Backing pad required, see chart in product images to determine the correct part. Discs are available in three grits: Coarse (Brown), Medium (Maroon), and Very Fine (Blue). Used for stainless steel, high-tensile steel, ferrous and non-ferrous metals, wood and fiberglass. Package of 10.