Soft brass wire brushes produce a finer finish than metal brushes. Use on softer metals like aluminum, brass, or copper. Brass bristles are rustproof. 3 styles - all have 1/4" shank.
A - #CT-512 - Crimped End Brush - 1-1/4" dia x 2-3/4" long. 4,500 rpm max
B - #CT-522 - 2" Wheel Brush - 2" dia x 1-1/2" long. 4,500 rpm max
C - #CT-524 - 3" Wheel Brush - 3" dia x 1-1/2" long. 4,500 rpm max