Dremel's 3/4" Brass Brush Accessory Bit.
A wheel-shaped brush with brass wire bristles. Brass brushes are non-sparking and softer than steel. They will not scratch soft metals like gold, copper, brass. Ideal for cleaning and surface-finishing items made from gold, bronze, copper or brass. Use to create a soft, satin or matte finish. Very effective on flat surfaces and in hard-to-reach areas like slots
One Brass Brush Bit
Rotary Tool Eye Protection
Brush Diameter: 3/4" (19.0mm) Shank Diameter: 1/8" (3.2mm) Max. Operating Speed: 15,000 RPM
Keep a light touch, letting the tips of the brush do the work. Too much pressure can break the wire bristles.