The 6-Piece Bronze Bristle Shotgun Bore Brush Set by Tipton is conveniently packaged caliber- and gauge-specific sets of brushes. Because they are caliber- and gauge-specific, you can be assured of an optimum fit to your firearm's bore for efficient and thorough cleaning. Contained in a durable, hinged box with marked cavities, it's easy to select the correct brush for your particular application. The core winding of some inferior brushes are cut at the end, leaving a sharp, exposed edge. The cut shank quickly loosens and leaves dislodged bristles with each pass down the bore. Tipton brush shanks are looped and wound, not cut. Tipton Bronze Bristle Bore Brush Set brushes are made from premium phosphor bronze for long life and cleaning power.