PACKAGE INCLUDES: This is a perfect pack of 100 pieces sandpaper and 1 piece sanding pad with shank. QUANTITY AND SIZE: There are 10 different grades of sanding mats, including 10 pieces of each grit: 80/100/180/240/320/400/600/800/1000/1200/2000/3000 Grit GENERAL COMPATIBILITY: 2 inch diameter hook and loop, for most types of tools, mold grinders, pneumatic grinders, electric drills, etc. SCOPE OF APPLICATION: Sanding discs suitable for iron plates, wood, plastic, tire industry surface polishing, ships, automobiles, fine grinding for burrs, rust removal, paint removal, etc. GOOD POLISHING EFFECT: The sandpaper is made of premium aluminum oxide, providing fast and long-lasting sanding. Grits are printed on the back for easy identification. Easy to install and remove, and won't fall off when installed or used.