This pack of 3M 31361 3" sanding discs contains 50 units of premium quality abrasive discs with a grit size of 80. These discs are designed with Cubitron II technology for a faster and cleaner cut, making them ideal for a variety of sanding applications. The discs feature a Hookit attachment system for easy and secure attachment to a sanding tool. They are suitable for use on a range of surfaces and materials, including wood, metal, and composites. With this pack, you can trust that you will get a consistent finish every time.