RBG780 Orange Disc Grinding wheel for RBG 712 & RBG 750 grinders. Restores blades to a factory edge. Durable ceramic resin fiber epoxied to a steel plate provides ultimate durability and ensures consistent results throughout the life of the wheel. Aggressive 24 grit ceramic material cuts grinding time and minimizes dust compared to traditional grinding wheels. The disc peels steel away from the blade leaving less residual material for a cleaner shop. Size 7" x 1/4" x 5/8". Sharpens over 200 blades!