5-Inch by 8 1500 Grit Premium Plus Hole Hook and Loop C-Weight Non-Loading Stearate Heat Treated Aluminum Oxide Sanding Discs. An excellent all-purpose disc with a fast cut on a durable yet flexible C-weight latex impregnated backing paper. Can be used for raw wood, paints, primers and finishes, composites, fiberglass and metal. Sun gold Abrasives have been manufacturing coated abrasive products for over 37 years. Can be used for sanding of wood, metal, composites, finishes, paint.