Diablo's premium 3-7/8 in. x 5-1/2 in. 120-Grit Fine CAT/Mouse Detail Sanding Sheet with Hook and Lock backing includes break-through innovations that improve performance, extend sanding life and increase productivity. These sanding sheets is designed for use in Mouse Black and Decker and Corner Cat Ryobi sanders and is ideal for all types of wood, metal and plastics.