Ripcord features a rigid, helix-shaped rubber core that keeps the cleaning surface pressed against the bore, engaging the rifling for an aggressive clean of 12 gauge shotguns. The braided Nomex surface can withstand temperatures up to 700° F, allowing you to clean at the range or in the field when the barrel is hot. The easy-feed design makes cleaning easy from breech to muzzle. The 8-32 threaded end fits all Otis cleaning components.