These Dremel accessories (403) are bristle brushes designed for polishing metals and plastics or steel. Ideal to use on surfaces including steel, aluminium, brass, silver, gold and other metals. Suitable to use with polishing compound (421). Working diameter 19.0 mm; shank diameter 3.2 mm; recommended maximum speed 15,000 RPM. Fits with all Dremel Multi-/Rotary tools or other 3,2mm shank size multi- / rotary tools.