3/8" soft felt disc</br>Ideal for polishing most metal surfaces and plastics</br>Use with #421 polishing compound (jeweler??s rouge) and apply lightly</br></br>Product Description</br></br><b>Dremel</b> 3/8"Diameter Felt Polisher for use With Mandrel #401 <br>Ideal for polishing most metal surfaces and plastics. When polishing precious metals such as gold and silver??use this bit with the #421 polishing compound (jewelers rouge) and apply lightly.</br><br/>http://www.amazon.com/gp/product/B00004UDH5M