TIPTON 13 PIECE RIFLE BEST BORE BRUSHES 17 - 45 CAL - SKU: T-14RBBBS Tipton"s 13-piece calibre-specific set of Best Bore Brushes means that you always have the right brush at hand. Contained in a durable, hinged box with marked cavities, its easy to select the correct Bore Brush for your particular application. Because they are calibre specific, you can be assured of an optimum fit to your firearms bore for efficient and thorough cleaning. All brushes have 8-32 threads except 17 and 20 calibre which have 5-40 threads. Kit includes: 17 cal (5-40 threads) 20 cal (5-40 threads) 22 cal 243/6mm cal 25/6.5mm cal 270/7mm cal 30/32 cal 338/8mm cal 35/9mm cal 375 cal 40/416 cal 44 cal 45 cal