Tipton 13-piece bronze rifle bore brush set w/storage case FEATURES-Conveniently packaged 13-piece caliber-specific set of Best Bore Brushes-Contained in a durable, hinged box with marked cavities-Caliber-specific brushes thoroughly clean .17 to .45 calibers-All brushes have 8-32 threads (.17 & .20caliber have 5-40 threads & is a standard bore brush) Other Features: 17-45 caliber all brushes have 8-32 threads (17 & 20 cal has 5-40 threads) contained in a durable, hinged box