Dremel 428-02 carbon steel wheel brush
3/4-inch carbon steel brush, sold as two in the documented pack.

How to choose
The wider wheel suits an exposed face with clearance. Compare a smaller head if nearby edges restrict access to the area to be cleaned.
Compatibility and limits
3/4-inch carbon steel wheel brushes · two mounted heads
Care
Use the brush tips with light pressure and check the speed limit printed for the exact brush. Dremel’s cleaning guide explains how pressure affects the working bristles.
Questions before buying
Is there a smaller carbon steel brush for the edge of a recess?
Compare the half-inch 442-02 cup. Its face fits a smaller opening, while this wheel’s wider contact suits a face with more room.