"The Otis Ripcord Multi-Caliber Gun Cleaning Cord 10-Pack delivers a quick, reliable single-pass clean, effectively removing dirt, residue, and fouling from lands and grooves. The Breech-to-Muzzle design allows you to clean your gun in a natural travel direction for a safe, yet reliable clean, with no gravity feed necessary. The rigid, helix-shaped rubber core keeps the cleaning surface pressed against the bore, engaging the rifling for an aggressive clean. The braided Nomex surface can take up to 700 heat, so you can clean it while the barrel's still hot. Attach a bore brush to get an even more thorough clean. Manufacturer model #: FG-RC-SET1. Breech-to-Muzzle design Helix-shaped rubber core maintains pressure against the barrel Rigid Nomex fibers loosen and capture fouling particles Equipped to fit all Otis cleaning components 8/32"" threaded adaptors on both ends"