Breakthrough Clean Technologies® Nylon Bristle Bore Brush - .357 & .38 Caliber and 9mm, Brass Core Product Features • GUN CLEANING BRUSH: This .357 & .38 Caliber & 9mm bore brush features a #8-32 thread, rugged brass core and stiff nylon bristles to attack heavy carbon build-up in your firearm. Our gun brush is a handy accessory to add to your rifle cleaning kit. • NYLON BORE CLEANER: One of the best things about our gun brushes is that they don't scratch when cleaning and maintaining your guns.
