Otis Bore Brushes are caliber specific, with each color-coded brush having a size indicated on the stem to ensure that the right brush is always selected for use. Otis brushes have a patented TufcorA(R), corrosive-resistant core wire that has a tighter twist for better bristle retention & brush life. Otis Bore Brushes 2-pack comes with one (1) Nylon brush & one (1) Bronze brush.
