Diablo's premium 3-7/8 in. x 5-1/2 in. CAT/Mouse Detail Sanding Sheets with Hook and Lock backing include break-through innovations that improve performance, extend sanding life and increase productivity. Featuring an aluminum oxide grit blend and ENDURA-BOND, these sheets quickly remove material while providing the user with a longer sander life. The Hook and Lock backing allows for repeated reattachment on Mouse Black and Decker and Corner Cat Ryobi sanders when sanding wood, metal and plastics.