https://www.rmcabrasives.com/products/ap57-velcro-backed-sanding-discs/ RMC AP57 adhesive backed sandpaper discs adopt antistatic and high wear-resistant backing paper. That can reduce clogging problems and improve the lifetime. Special treated FEPA standard Aluminum Oxide grain and high strength resin adhesive bring the product excellent cutting acting, perfect polishing surface and long sanding life. AP57 velcro disc is used in sanding leather, artificial leather, textile, wood, and composite material.All Rights Reserved