Set of 18 Steel Wire Wheel Brushes For Die Grinder/Rotary Tool Suitable for your dremel / Foredom machine tools.Ideal for Removing Rust/Corrosions from Any Metal Surfaces (e.g.: Steel, Aluminum, Zinc alloy, Brass, Copper, etc.), especially Precious metals.Perfect Accessories for Jewelers, Locksmiths, Gunsmith, Technicians, Coin Collectors, Archeologist, Students, Hobbiest ect.Each brush is approximately 13/16" (20 mm) in diameter and is mounted to a 1/8" (3 mm) diameter mandrel.Please contact us for bulk purchase, So we can give good discount.