Rich Product Specifications: This 170pcs 2 inch sanding disc set includes alumina discs (grit 40/60/80/120/180/240, 20pcs each), zirconia discs (grit 60/80/120, 5pcs each), non-woven discs (blue/yellow/red, 5pcs each), 40-grit flap discs (5pcs), stripping discs (purple/blue/black, 2pcs each), wool discs (5pcs), 2pcs of 1/4 - inch holders, and 2 shanks (round and hex). With an ample quantity of various discs, it can meet all your sanding, grinding, and polishing needs Premium Materials: The 2-inch die grinder accessories are made with high-quality abrasives (alumina/zirconia/non-woven alumina/silicon carbide/wool). The 1/4-inch twist lock holder features high strength and toughness, ensuring long-lasting durability and high wear resistance Effortless Quick-Change Design: These quick change sanding discs are equipped with unique safety torque screws. You can easily and quickly attach them to the grinding disc arbor by simply unscrewing and screwing, making it convenient to replace the grinding discs. They can reach a maximum speed of 23000 RPM, guaranteeing stable operation without detachment High Compatibility: The set is compatible with 2 1/4-inch shanks (round and hexagonal) and is suitable for any 1/4-inch electric drills, die grinders, pneumatic grinders, and other power tools Versatile Applications: Ideal for rust removal, paint stripping, grinding, and polishing on various surfaces such as wood, metal, steel, plastic, and rubber. Widely used in mechanical manufacturing, automobile, aviation, shipbuilding, furniture restoration, and DIY projects 170pcs 2 Inch Sanding Discs Set, Die Grinder Sanding Disc Quick Change Twist Lock Disc for Drill Die Grinder Accessories with 1/4 Inch Holder for Metal Wood Grinding Polishing Rust & Paint Removal