Delta Series AR-15 Complete Brush Set is specifically designed for cleaning your AR-15. The brushes are made of a high quality stiff nylon, spun around steel cores for added stability. It features a brush with an 8-32 thread that fit on the included cleaning handle or any 8-32 cleaning rod. The brush set has everything you need to clean your rifle, plus everything you need to keep your magazines clean and running reliably. he Brush Set Includes: Magazine/Upper Receiver Brush with Magazine Take down Tool Bolt Carrier Brush, Chamber Brush, .22 Cal Bore Brush and Handle.