Make reloading cleaner and easier for better results in the end with RCBS Case Neck Brushes. These nylon bristled brushes clean dirt and powder residue from the inside of case necks while applying lubrication at the same time to ease the amount of force required during case neck expansion in the resizing process. Small brush designed to work with .22 to .25 calibers, medium brush - .27 to .30 caliber, and large brush - .35 to .45 caliber. Brushes sold separately. NOTE: Brush must have lube applied to the bristles to lubricate the inside of the case neck. Makes reloading cleaner and easier for better results Cleans dirt and powder residue from inside of case necks Also applies lubrication for easier neck expansion Nylon bristles Small brush - .22 to .25 calibers Medium brush - .27 to .30 caliber Large brush - .35 to .45 caliber