The selection of double-ended brushes gives you the ability to clean firearm surfaces effectively and without damaging them. They are constructed of durable, flexible plastic handles and bristles that are resistant to flatting and breaking. The breech brushes do not react with cleaning solvents or oils and will not corrode. Nylon bristles are best for the most delicate parts of a firearm. This brush protects the beautiful finish, as well as the surfaces of older firearms with a fine patina. Bronze bristles with its stout nature, removes hard deposits easily and without damaging many blued or stainless surfaces. Stainless steel bristles can be abrasive and should be used with care. Use this brush on the most stubborn deposits.- 3-Pack