Note: Pictured at center of photo. These felt blocks are perfect for rubbing out finishes with Pumice Stone (sold separately, Rockler #53884) or Rotton Stone (sold separately, Rockler #53892). Can be used with water or a rubbing oil. Water gives a faster cutting action. Rotten stone is a finer grit than Pumice stone. Use Rotten stone after Pumice stone to achieve a higher gloss.