This soft natural rubber Expander Wheel conforms to slightly contoured pieces and leaves a smooth, uniform finish. Can be used with abrasive bands, Scotch- Brite belts or the Trizact belts. They stay firmly in place because centrifugal force expands the rubber wheel. The Expander Wheel is designed to run at 2,400 rpm so excessive cutting does not occur. Belts/Bands for the Expander Wheel: Expander Wheel Belts- Available in 80, 120, 220, 320, 400 Grit Sizes (Supplied in a 5pk) Finishing Belts - Available in Coarse, Medium and Fine (Supplied in singles) Trizact Bands - Available in A45 400 Grit, A30 700 Grit and A16 1200 Grit (Supplied in a 2pk)