The most effective way to grind and polish the tight radius is the diamond polishing drum wheel, and The Diamond Tool Store has what you need. The diamond drum wheel can be a twisted metal drum wheel in 2", 3", 4" or larger (special order), the diamond drum can also be a twisted resin filled metal drum, the new diamond brazed drum wheels that come in 2", and 3" with zero tolerance, the metal bonded grinding drum wheels, and the resin diamond polishing drum wheel series that comes in 1", 2", 3", which is also available with the oscillating attachment made popular by "Galasky". All of the resin diamond polishing drums wheels are available in 50 grit, 100 grit, 200 grit, 400 grit, 800 grit, 1500 grit, 3000 grit, and black buff and white buff. If you ever had to polish a sink opening for the installation of a undermount sink you know that you cannot live without these diamond polishing drum wheels.
