Pro Shot Total Fouling Removal 4 Brush Nylon Bristle Kit for AR15 .223-Caliber METAL Made in USA AR-15 Platform TFR (Total Fouling Removal) Kit for the AR-15 Rifle (.223 Cal.) is made with black heavy duty long lasting nylon bristles These brushes were made specifically for your AR-15 and built tough so they can be used repeatedly Fits Standard American Cleaning Rod with #8-32 Threads Kit Contains the Following Brushes: Upper Receiver Brush, Bolt Carrier Brush, Bore Brush and Chamber Brush All Pro Shot brushes are Proudly made of USA components and assembled in the USA, #8-32 Threads