Bore Tech NYLON PISTOL BRUSH .357 / .38 CAL / 9MM 8/32 M THR. 45 Cal - Bore Tech's Proof-Positive Nylon Bore Brushes are 100 percent barrel safe and set the benchmark for all other nylon brushes. This is due to the superior construction and engineered features that are incorporated into each and every brush. It features twice the amount of extra ridged nylon bristles and each caliber has specifically tailored bristle diameters resulting in double the scrubbing action and faster cleaning. The Bore Tech BTNP-44-003 Proof-Positive Nylon Pistol Brushes .45 Cal is a quality addition to the Bore Tech lineup. For more great deals on Gun Brushes by Bore Tech please browse our Bore Tech Gun Cleaning Kits page. Bore Tech NYLON PISTOL BRUSH .357 / .38 CAL / 9MM 8/32 M THR BTNP-38-011