Our 3M Cubitron II file belts 786F is a 3M best in class abrasive belt, designed for use with the 3M file belt sander, for tasks like grinding out rivets and removing spot welds. 3M precision shaped grain is resin bonded on a heavy-duty backing for a more consistent finish, cooler operation and 2X more belt life. The resin bond and a grinding aid keep this belt cutting cool and sharp.