1" Miniature Crimped Brass Wire Brush mounted on 1/8" arbor Miniature Brass Wire Brush mounted on 1/8" arbor is used to clean, polish and producing special finishes on metal such as copper and brass. These crimped (.005") wire brushes are used to achieve a softer or matte finish. These have a double section of wire, 1" in diameter mounted on a 1/8" mandrel. Sold individually.