This Is Dremel"s 1/2" Brass Brush Accessory Bit. FEATURES: A cup-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. INCLUDES: One Brass Brush Bit REQUIRES: Rotary Tool Eye Protection SPECS: Brush Diameter: 1/2" (13.0mm) Shank Diameter: 1/8" (3.2mm) Max. Operating Speed: 15,000 RPM COMMENTS: Keep a light touch, letting the tips of the brush do the work. Too much pressure can break the wire bristles. kr10/3/01 ir/kh