This Gunmaster Deep Cleaning Kit with Case is designed specifically for .357, .38, and 9mm calibers, providing a comprehensive cleaning solution for your pistols. This kit includes a bore brush and bore mop, allowing for easy and effective deep cleaning of your gun. The set comes with a durable case for convenient storage and transport, making it a convenient and essential tool for gun enthusiasts and hunters alike. The kit features a combination of brass and plastic materials, ensuring quality and longevity in your cleaning routine.