C-Multi Competition Kit Includes Pro-Shot's original Benchrest Quality brass jags for the most popular large pistols include: .357/.38 Cal./9mm,10mm/.40 Cal., .45 Cal., Muzzle Guard, & Brass Patch Holder. As recommended by most Pistol Manufacturers for use in their barrels; a superior quality Nylon Bristle/Brass Core Brush made to work from .38-.45 Cal., a starter sample of our 100% Cotton Flannel Patches and 1/4 oz. of 1-Step Cleaner and Lubricant.