The Otis Ripcord is one of the easiest ways to keep the bore of your rifle clean. In one quick and easy pass, it cleans your bore from breech to muzzle. It is made of a molded rubber core and Nomex fibers. A 10 inches aggressive cleaning surface loosens and captures fouling particles. The helical shape of the Ripcord engages rifling throughout the barrel. The ends are equipped with 8-32 threads to fit all Otis cleaning components..