The 3M Green Corps 5x7/8´´ 40G Fibre Sandpaper Disc is a professional-grade sandpaper disc designed for sanding, cleaning, and prepping various surfaces. This pack includes 20 units of high-quality sandpaper discs that are perfect for use on boats and equipment.The 40 grit abrasive surface is designed for heavy-duty sanding tasks, making it ideal for removing stubborn rust, paint, and other coatings from metal surfaces. The durable fibre backing ensures long-lasting performance and superior sanding results.These sandpaper discs are versatile and can be used for a wide range of maintenance and cleaning tasks, such as smoothing rough surfaces, prepping surfaces for painting or coating, and shaping and polishing metal surfaces. Whether you are working on a boat, machinery, or equipment, the 3M Green Corps sandpaper discs will help you achieve professional results every time.