ZFE 42Pcs Brass Steel Wire Brush Polishing Wheels Full kit for Proxxon Dremel Rotary Tools Do Sanding,Polishing CLEANING: Remove burrs, rust, dust and oxide layer in products surface and hard-to-reach corner. Especially for item made from brass, copper, stainless steel,gold, bronze,silver. COATING: Improving the quality of products by stripping residue, deburring grinding,polishing. APPLICATIONS: Be used in the micro-electronic equipment,jewelry and impression Production. It`s a great accessories for Locksmiths, Gunsmith, Jewelers, Technicians, Coin Collectors, Archeologist, Students COMMON USAGE: Fit your hand drill, drill press, Dremel and foredom tool with a 1/8" Collet MATERIALS: Steel Britle is hard, good to use in steel and aluminum surface, very nice in sanding metal surface