Innovative : it can be used DRY and WET on materials of any hardness Time Saving: it cuts 25-40% faster, eliminates wheel changes and cutting with dull wheels Long-Lasting: 10 to 15 times longer than conventional wheels No Gum-Up or Clogging: regular spacing between the diamond aggregates ensures immediate removal of debris ...look at THE RESULTS: provides smoother finish than comparable to coarse wheels! Available in two different sizes