Available in sizes from .032 thru 1/2" diameters, these brushes are constructed with abrasive filled nylon filaments to provide extra cutting and cleaning action in a variety of applications including cross hole deburring, micro burr removal, internal cleaning, removal of small imperfections and surface preparation. Available abrasives include silicon carbide and aluminum oxide in grits from 80 to 600. Specifically designed for thru hole applications.Silicate is a mild abrasive; .008 LV Filament.