Gesswein miniature mandrel-mounted end brushes are available in a wide variety of sizes. One-piece, rubber coated for protection, ferrule construction ensures that the stem and ferrule will not become separated during use and offers some protection if accidentally hit against the piece you are polishing.  Hard and Soft bristle types are made of animal hair.  Maximum operating speed: 25,000rpm.  Sold in packages of 12 each.  Made in Germany.