Possum Hollow Bore Guide #24 - .300 Winchester Magnum, 7MM Remington Magnum Fits Ruger #1

Aligns the cleaning rod centrally to the bore to prevent throat or rifling damage. O-ring seals the chamber and prevents solvents from contaminating the action and trigger and helps to keep the bore guide firmly in place. Large replacement O-ring fits all guides and solvent port.