This cleaning kit contains 6 precision fit brushes. The brushes clean the Upper Receiver Chamber Bolt Carrier the Bore the Bolt Carrier Key Tube and the Gas Tube. The Gas Tube Brush inserts easily into the guide tube to clean the entire length of Gas Tube without disassembly of the upper receiver. Using this brush with the Iosso Triple Action Oil will remove carbon build-up. The kit also includes the Eliminator Cleaning Tool & Rod. The rod is stationary and will not spin. Use the Cleaning Tool & Rod with the Upper Receiver Brush Chamber Brush and Bolt Carrier Brush. The Cleaning Tool alone is used for the Bolt Carrier Key brush and as a handle to attach to the Bore Cleaning Rope. The Eliminator Cleaning Tool is handy because it can be used for tight cleaning jobs where a regular rod is too long and cumbersome to use. This short sturdy tool is useful with any Eliminator Brush to clean pistol bores chambers revolver cylinders neck turning case cleaning etc. A handy accessory pouch is included to carry all of the components of the kit including the solvents. The Iosso Bore Cleaner and Iosso Triple Action Oil Solution are recommended cleaners to be used with the kit and are sold separately.