Made from aluminium oxide abrasive, durable and anti-static. The grits are marked on the back of the discs for easy identification. Widely used in the grinding and polishing of metal and non-metallic materials of various complex surface rust. Including automotive, wood, artificial stone, plastic, glass, etc. Features: 25-Piece Multi-Grit Sandpaper Set - Our sanding discs set provides you with the multi-grit sandpaper you need. You will get 25 total orbital sander pads of 5 different grades including 40 grit, 60 grit, 80 grit, 180 grit and 240 grit. The higher the number, the finer the grit. High-Quality Construction - Our sanding pads are made from high-quality aluminum oxide abrasive, which is durable and anti-clogging. The aluminum oxide grain delivers a fast cut and a smooth finish to your project. Premium Back with 6 Holes - Back of napping makes grit removal and replacement quick and lengthens the life of each disc, 6 holes are designed for efficient dust extraction. Universal Compatibility - Our 9-inch (220mm) sanding disc is suitable for various universal drywall sanding machines on the market. Wide Applications - New sanding discs are ideal for grinding and finishing on metal and non-metal, wood, rubber, leather, plastic, stone, glass, and other materials. Specifications: Quantity: 25 Pcs, 15 Pcs (Optional) Material: Aluminium Oxide Sandpaper Size: Dia 220mm / 9 inch Holes: 6 Holes Grit Grades: 40# 60# 80# 180# 240# Color: Red Package Weight: 437.5g / 15.43oz Package Size: 23 * 23 * 13cm / 9.01 * 9.01 * 5.12in Package List: 25 * Sanding Discs (40/60/80/180/240 Grit)