Convenient introductory sets allow you to try similar brushes for your application. 

Crimped miniature wire wheel brushes, with solid steel ring construction, mounted on 1/8" shanks. Consists of 1 each of the 3/4" and 1" diameter brushes in 0.003" brass, single or double row, 0.003" or 0.005" steel in single or double row, and 0.005" stainless steel single row. These fine crimped wire brushes are excellent for light-duty cleaning and deburring on non-ferrous and precious metals. Use with flexible shaft, micromotor, or high-speed pencil die grinders.

Maximum operating speed 37,000rpm. Brushes are also available individually, sold in dozen quantities (see related products).