Otis Technology Rifle and Pistol Bore Brushes are state of the art, precisely engineered bore brushes designed to give you the maximum in weapons maintenance capability. The bristles of these cleaning tools are corrosion resistant and less prone to falling out, thanks to their Tufcor proprietary core wire and tighter twist design. All cleaning chemicals are welcome on these Otis Technology cleaning tools, and they feature a cold-welded stem for extended durability.