Ryobi 039065005022 Dust Bag Assembly Fits Various Ryobi Models Including: S652DK 1/4 Sheet Double Insulated Sander, RS290 Random Orbit Sander, CFS1503K Corner Cat Sander, CFS1503 Sander, CFS1503G Corner Cat Sander, RS290G Random Orbit Sander, S652D 1/4 Sheet Double Insulated Sander The Dust Bag Is Used To Collect The Dust And Debris When The Sander Is In Use It Is Connected To The Spout On The Sander Housing