The Mastercraft 5” Hook & Loop Discs for Sanding 5-Pack contains durable sanding discs designed for orbital sanders with an 8-hole pattern. This impressive collection of random orbital sandpaper features grits made from aluminum oxide, which makes them ideal for general-purpose sanding or removal of stock, surface coatings, and rust. The Mastercraft sanding discs in this kit will fit onto the majority of standard disc sanders with an 8-hole design, including those from brands other than Mastercraft. The sandpaper included with this set can allow you to easily complete a wide array of sanding, polishing, and other similar applications. Finally, the discs are made from durable synthetic material with self-renewing properties that allow the surface to break down under the heat and pressure of continuous sanding to create new sharp edges, extending the overall life of the orbital sandpaper.