Why recommend you to choose our sandpaper ? We are a team that specializes in manufacturing and producing sandpaper and sanding belts, with professional designers and engineers, and equipped with professional production equipment to ensure product quality and after-sales service. Therefore, the highlights of this sandpaper are as follows： 1、It is a 5-inch 8-hole disc sandpaper for useing with most 5 inch random orbit sander, such as DeWalt DW421/DW423/ DWE6421K/DWE6423K, Bosch 3107/3725/ROS20VSC/3725DEVS ROS10 Ridgid R26011 Ryobi RS290G /BO5041K Black & Decker BDERO100 and more. 2、Our sanding discs are made of aluminum oxide corundum which are sharp cut, smooth and uniform. They can help you get the job done fast, save time, save money. 3、We use a hook-and-loop backing design to make the sandpaper and sander stick more firmly and easily disassembled. Tips： If you need more types of sandpaper or sanding belts, please enter my shop to choose. Sturdy alumina materials The surface of the sandpaper is made of strong alumina materials. They can polish or polish your materials efficiently. Due to the different density of sand on the surface of the sandpaper, different sandpapers will show different effects. So you can choose the right grit for your job. *Tips: 40-80 Grit Extremely coarse; best for removing large amounts of material and rounding off corners. 100-150 Grit Medium grit; good for general purpose sanding. 180-220 Grit Fine; used to roughen surfaces for painting or as a first passthrough for later sanding with ultra-fine grits. 320 & Up Grit Ultra-fine; helps achieve a nearly glass-smooth texture. Hook & Loop Backing Design In order to be able to absorb the sanding disc and the sander more firmly, we use a hook and loop backing, which can ensure that the sandpaper has no dead corners and is tightly adsorbed on the sander, and can be easily removed, which will let you The polishing effect is more efficient and flexible. And easy to identify exact grit.