This is Dremel"s 3/4" Carbon Steel Brush Accessory Bit. FEATURES: A wheel-shaped brush with carbon steel wire bristles. Ideal for cleaning flat surfaces and removing rust and corrosion from items made of brass, copper, or other soft ferrous metals such as tools, door knobs, automobile parts, and electrical contacts. Remove buildup from faucets, clean camp stove burners and more! You can also use wire brushes to create an artistic effect on coarse- grained wood. Its shape makes it well suited for getting into hard-to-reach places like slots. INCLUDES: One Carbon Steel Brush Bit REQUIRES: Rotary Tool SPECS: Brush Diameter: 3/4" (19.0mm) Shank Diameter: 1/8" (3.2mm) COMMENTS: Do not run in excess of 15,000 RPM. Therefore, do not use with a Single-Speed MultiPro Rotary Tool or Heavy-Duty Flex-Shaft Tool unless you use the Foot Speed Control. Never use carbon steel brushes on items made from stainless steel, aluminum or other nonferrous metals. This prevents rust and contamination. kr11/15/01 ir/kh