For 5.56mm/AR-15; Quickly and effectively cleans the star chamber; Parkerized steel scraper to remove fouling build-up and felt cleaning pads to pick up the fouling loosened by the scraper; Coated brass nose piece centers the tool in the chamber for proper cleaning, while ensuring it won't scratch or damage the firearm; With 8-32 threads, a chamber brush or other scraper components can be attached to this tool; Comes with 6 cleaning pads; Limited Lifetime Warranty