IIT 80615 Sanding Drum Set, 51-Piece 120 grit bands Set includes 15 of each size sanding band & 6 reusable drums/mandrels Bands have a diameter of 1/2", 3/8", & 1/4" Includes 1/2-Inch, 3/8-Inch and 1/4-Inch sizes for any surface Reusable Drums, fit any brand of sanding bands