For removing burrs, scale, and dirt from interior surfaces, such as tapped or threaded holes, usually powered by a portable drill, lathe, or drill press. Brush part diameters range from ? to 1 ?,
overall length from 2 1/8 to 2 ?, and fill materials include steel, stainless steel and brass in a range from .003 to .008. Sidetuft holders are available separately for higher speed operation.