Our original formula has been a favorite with hunters, competition shooters, and recreational shooters since 1903. Trusted throughout the years, Hoppe's No. 9 Gun Bore Cleaner can be used to clean all pistol, rifle, and shotgun bores and penetrates deeply to remove carbon, powder, and lead fouling. It also loosens abrasive debris to prevent wear and tear on your firearm. The easily recognizable Hoppe's No. 9 scent has become synonymous with a clean firearm and has been a staple in range bags and on gun benches for over 100 years.