Convenient introductory sets allow you to try similar brushes for your application.  Set of 8 straight wire end brushes. Contains 2 each of the 0.003" brass, 0.003" steel, and 0.003" stainless steel in a trim length of 1/4" and 2 each of the 0.004" steel in a trim length of 3/8".

Miniature wire end brushes contains fine straight wire fill for light-duty cleaning and deburring very small recessed areas or ID's. Use with flexible shaft, micromotor, or high-speed pencil die grinders. Maximum operating speed is 37,000rpm.  All brushes are also available individually, sold in dozen quantities (see related products).