Bore tech's proof-positive nylon bore brushes eliminate the false indication of copper fouling found with traditional bronze brushes and copper removing cleaners.With twice the amount of oversized bristles, double wound cores, looped ends and barrel safe studs these brushes are ridged and provide safe and effective scrubbing action.Thread Pattern: 8-32Type: BrushSize: 30 CalQuantity: 3 Per PackBristle Type: NylonLength: 2.50"Material: AluminumSuitable For: Rifle