With more than 100 years of gun care experience, the Hoppes brand is trusted by gun owners around the world. You can rest assured that that the Hoppes 9mm caliber phosphor bronze brush will get the job done right. A clean gun is a safe gun, and with the features of this bore brush, you can't go wrong. The bristles of this brush are constructed of durable phosphor bronze for long lasting performance, and because this metal is a softer metal than the gun barrel, it will not damage the rifling. With its spiral bristle design, the Hoppes bore brush is capable of scrubbing in multiple directions which allows it to effectively and efficiently loosen the fouling that can build up from both gun powder and copper jackets. As an added benefit, you don't have to worry about your brush becoming degraded by gun oils and chemical solvents. Furthermore, this brush is washable and the size and weight make it easy to store for continued use.