This pack of 3M 321U Series 6" Multi-Hole Abrasive Sanding Discs is a must-have for any automotive or shop tool kit. With 50 dry sanding discs in 500 grit, you'll have plenty to tackle any job that comes your way. The blue color makes them easy to spot, and the multi-hole design allows for optimal dust extraction. These high-quality discs are made by 3M, a trusted brand in the industry. The discs are designed to be used with a variety of machines and tools, and their durability means they'll last for multiple jobs. Whether you're a professional mechanic or a DIY enthusiast, these sanding discs are sure to get the job done right.