Otis Ripcord Handgun Bore Cleaner - Otis' Ripcord has unrivaled one-pass cleaning and cleans from Breech-to-Muzzle. The helix shape engages rifling through the barrel, while the molded rubberized core and Nomex fibers act as both a brush to loosen and a patch to capture fouling particles. It is equipped with brass 8-32 threaded ends to fit all Otis cleaning components and is heat resistant up to 700 degrees F.