4 Brass Wire Wheel Brushes Polishing Tools fits Dremel. This is a new set of 4 miniature brass wire wheel brushes. They can be used with a Dremel tool. These brushes are great for polishing or finishing metals such as copper and brass. Each brush is approximately 3/4" (19 mm) in diameter and is mounted to a 3/32" (2.4 mm) diameter mandrel.