3M™ Roloc™ Disc 777F features 3M-engineered high-performing ceramic abrasive grain blended with aluminum oxide for a combination of durability and cutting efficiency that increases productivity for both stock removal and finishing. The heavy, water-resistant polyester backing supports medium-pressure applications, a consistent cut-rate, and both wet and dry applications. 3M™ Roloc™ Discs 777F provide a fast, efficient method for grinding, light grinding, blending, leveling and finishing. This product features a grinding aid which enhances performance on stainless steel and other exotic alloys and allows for cooler running. Discs are made of a ceramic aluminum oxide blend and have a cloth backing for durability. Recommended in offhand and pressure grinding on all exotic metal alloys. They lock securely in place with just a half twist - another half twist and they’re off. Each disc is colour coded by grade.