Dremel Model 511E – These buff wheels are ideal for cleaning and light sanding. They can be used on metal, glass, wood, aluminum and plastics and with either a standard Dremel mandrel or the EZ Lock mandrel (856719). Mandrels sold separately. The maximum speed rating on these wheels is 15,000 RPM. This product contains one 180-grit wheel buff and one 280-grit wheel buff.